Biology, Stanford University

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Selected Publications of Hadly Lab Members

Authors Year Title Journal Issue Link
Hsu JL, Crawford JC, Tammone MN, Ramakrishnan U , Lacey EA, Hadly EA 2017 Genomic data reveal a loss of diversity in two species of tuco-tucos (genus Ctenomys) following a volcanic eruption. Scientific Reports Volume 7, Issue 1, Pages 16227 [link]
Cooke SB, Mychajliw AM, Southon J, MacPhee RDE 2017 The extinction of Xenothrix mcgregori, Jamaica’s last monkey Journal of Mammalogy Volume 98, Issue 4, Pages 937–949 [link]
Cooke SB, Dávalas LM, Mychajliw AM, Turvey ST, Upham NS 2017 Anthropogenic Extinction Dominates Holocene Declines of West Indian Mammals Annual Review of Ecology, Evolution, and Systematics Volume 48 [link]
Stegner MA, Karp DS, Rominger AJ, Hadly EA 2017 Can protected areas really maintain mammalian diversity? Insights from a nestedness analysis of the Colorado Plateau Biological Conservation Volume 209: 546-553 [link]
Hsu JL, Kam S, Tammone MN, Lacey EA, Hadly EA 2017 Rapid increase in genetic diversity in an endemic Patagonian tuco-tuco following a recent volcanic eruption Journal of Mammalogy 98(3): 779-792 https://doi.org/10.1093/jmammal/gyx008 [link]
Frank HK, Flanders JR 2016 Anolis aquaticus (Norops aquaticus) sleep slite fidelity Herpetological Review 47(1): 131-132
Solari K, Frank HK, Frishkoff LO, Hsu JL, Kemp ME, Mychajliw AM, Hadly EA 2016 Opportunity for some, extinction for others: the fate of tetrapods in the Anthropocene Evolutionary Ecology Research Vol. 17: 787-813 [link]
Barnosky AD, Hadly EA, Gonzalez P, Head J, Polly PD, Lawing AM, Eronen JT, Ackerly DD, Alex K, Biber E, Blois J, Brashares J, Ceballos G, Davis E, Dietls GP, Dirzo R, Doremus H, Fortelius M, Greene HW, Hellmann J, Hickler T, Jackson ST, Kemp M, Koch PL, Kremen C, Lindsey EL, Looy C, Marshall CR, Mendenhall C, Mulch A, Mychajliw AM, Nowak C, Ramakrishnan U, Schnitzler J, Das Shrestha K, Solari K, Stegner L, Stegner MA, Stenseth NC, Wake MH and Zhang Z. 2017 Merging paleobiology with conservation biology to guide the future of terrestrial ecosystems Science Vol. 355, Issue 6325 DOI: 10.1126/science.aah4787 [link]
Dahal N, Lissovsky AA, Lin Z, Solari K, Hadly EA, Zhan X, Ramakrishnan U 2017 Genetics, morphology and ecology reveal a cryptic pika lineage in the Sikkim Himalaya Molecular Phylogenetics and Evolution Vol. 106 [link]
Marcy AE, Hadly EA, Sherratt E, Garland K, Weisbecker V 2016 Getting a head in hard soils: Convergent skull evolution and divergent allometric patterns explain shape variation in a highly diverse genus of pocket gophers (Thomomys) BMC Evolutionary Biology 16:207 DOI:10.1186/s12862-016-0782-1 [link]
Yonghua W, Hadly EA, Teng W, Hao Y, Liang W, Wang H 2016 Retinal transcriptome sequencing sheds light on the adaptation to nocturnal and diurnal lifestyles in raptors Scientific Reports 6, Article # 33578 DOI:10.1038/srep33578 [link]
Frishkoff LO, Karp DS, Flanders J, Zook J, Hadly EA, Gretchen GC, M'Gonigle L 2016 Climate change and habitat conversion favor the same species Ecology Letters In Press In Press
Ochoa A, Wells SA, West G, Al-Smadi M, Redondo SA, Sexton SR, Culver M 2016 Can captive populations function as sources of genetic variation for reintroductions into the wild? A case study of the Arabian oryx from the Phoenix Zoo and the Shaumari Wildlife Reserve, Jordan Conservation Genetics DOI: 10.1007/s10592-016-0850-5 [link]
Frank HK, Mendenhall CD, Judson SD, Daily GC, Hadly EA 2016 Anthropogenic impacts on Costa Rican bat parasitism are sex specific Ecology and Evolution DOI: 10.1002/ece3.2245 [link]
Lyons SK, Miller JH, Fraser D, Smith FA, Boyer A, Lindsey E, and Mychajliw AM 2016 The changing role of mammal life histories in Late Quaternary extinction vulnerability on continents and islands Biology Letters 12(6):20160342 DOI: 10.1098/rsbl.2016.0342 [link]
Goldberg A, Mychajliw AM, and Hadly EA 2016 Post-invasion demography of prehistoric humans in South America Nature DOI:10.1038/nature17176 [link]
Barnosky AD, Ehrlich PR, and Hadly EA 2016 Avoiding collapse: Grand challenges for science and society to solve by 2050 Elementa DOI 10.12952/journal.elementa.000094 [link]
Mychajliw AM, Kemp ME, Truebe S, and Hadly EA 2016 A Geographic Approach to Teaching and Communicating Global Change in California In STEM & GIS in Higher Education (Cowen DJ, ed.) ESRI Press In Press
Hsu J, Wrona A., Brownell S., and Khalfan W. 2016 Early exploration enhances education: single session research-based courses promote undergraduate research involvement and provide teaching opportunities for graduate students and postdocs Journal of College Science Teaching Vol 45, Issue 6, 78-86 [link]
Kemp ME and Hadly EA 2016 Rocking earth’s biodiversity cradle: challenges, advances and prospects for conservation paleontology in the tropics Journal of Vertebrate Paleontology DOI: 10.1080/02724634.2016.1179640 [link]
Hadly EA and Feranec RS 2016 Paleovertebrate communities of California from 70 million years ago to the present In Ecosystems of California (Zavaleta E and Mooney HA, eds.) University of California Press
Kemp ME and Hadly EA 2016 Early Holocene turnover, followed by stability, in a Caribbean lizard assemblage Quaternary Research DOI: 10.1016/j.yqres.2015.12.007 [link]
Blois JL and Hadly EA 2015 Fossils from northern California reveal insights about biological responses to future climate change In Linking Science and Management to Conserve Biodiversity in a Changing Climate (Root TL, Hall KH, Herzog M, Howell CA, eds.) University of California Press [link]
Barnosky AD, Lindsey EL, Villaviciencio NA, Bostelmann E, Hadly EA, Wanket J, and Marshall CR 2015 Variable impact of late-Quaternary megafaunal extinction in causing ecological state shifts in North and South America Proceedings of the National Academy of Sciences DOI: 10.1073/pnas.1505295112 [link]
Kemp ME and Hadly EA 2015 Extinction biases in Quaternary Caribbean lizards Global Ecology and Biogeography DOI: 10.1111/geb.12366 [link]
Mychajliw AM, Kemp ME, and Hadly EA 2015 Using the Anthropocene as a teaching, communication and community engagement opportunity The Anthropocene Review 2(3):267-278 [link]
Knope ML, Heim NA, Frishkoff LO, and Payne JL 2015 Limited role of functional differentiation in early diversification of animals Nature Communications 6(6455) [link]
Frishkoff LO, Hadly EA, and Daily GC 2015 Thermal niche predicts tolerance to habitat conversion in tropical amphibians and reptiles Global Change Biology DOI: 10.1111/gcb.13016 [link]
Judson SD, Frank HK, and Hadly EA 2015 Bartonellae are prevalent and diverse in Costa Rican bats and bat flies Zoonoses and Public Health DOI: 10.1111/zph.12188 [link]
Muñoz MM, Crandell KE, Campbell-Staton SC, Fenstermacher K, Frank HK, Van Middlesworth P, Sasa M, Losos JB, and Herrel A 2015 Multiple paths to aquatic specialisation in four species of Central American Anolis lizards Journal of Natural History DOI: 10.1080/00222933.2015.1005714 [link]
Mychajliw AM and Harrison RG 2014 Genetics Reveal the Origin and Timing of a Cryptic Insular Introduction of Muskrats in North America PLoS One 9(10): e111856. doi:10.1371/journal.pone.0111856 [link]
Karp DS, Judson S, Daily GC, and Hadly EA 2014 Molecular diagnosis of bird-mediated pest consumption in tropical farmland SpringerPlus 3: 630 [link]
Zhan S, Zhang W, Niitepõld K, Hsu J, Fernandez Haeger J, Zalucki MP, Altizer S, de Roode JC, Reppert SM, and Kronforst MR 2014 The genetics of monarch butterfly migration and warning colouration Nature 514: 317–321 [link]
Frishkoff LO, Karp DS, M'Gonigle LK, Mendenhall CD, Zook J, Kremen C, Hadly EA, and Daily GC 2014 Loss of avian phylogenetic diversity in neotropical agricultural systems Science 345 (6202): 1343-1346 [link]
Mendenhall CD, Karp DS, Meyer CFJ, Hadly EA, and Daily GC 2014 Predicting biodiversity change and averting collapse in agricultural landscapes Nature 509: 213-217 [link]
Bay RA, Ramakrishnan U, and Hadly EA 2014 A Call for Tiger Management Using “Reserves” of Genetic Diversity Journal of Heredity 105(3): 295-302 [link]
Barnosky AD, Brown JH, Daily GC, Dirzo R, Ehrlich AH, Ehrlich PR, Eronen JT, Fortelius M, Hadly EA, Leopold EB, Mooney HA, Myers JP, Naylor RL, Palumbi S, Stenseth NC, and Wake MH 2014 Introducing the Scientific Consensus on Maintaining Humanity’s Life Support Systems in the 21st Century: Information for Policy Makers The Anthropocene Review 1(1):78-109 [link]
Barnosky AD and Hadly EA 2014 Problem solving in the Anthropocene The Anthropocene Review 1(1): 76-77 [link]
Karp DS, Mendenhall CD, Sandi RF, Chaumont N, Ehrlich PR, Hadly EA, and Daily GC 2013 Forest bolsters bird abundance, pest control and coffee yield Ecology Letters 16(11):1339-1347 [link]
Tomimatsu H, Sasaki T, Kurokawa H, Bridle JR, Fontaine C, Kitano J, Stouffer DB, Vellend M, Bezemer TM, Fukami T, Hadly EA, van der Heijden MGA, Kawata M, Kefi S, Kraft NJB, Mumby PJ, Nakashizuka T, Petchey OL, Romanuk TN, Suding KN, Takimoto G, Urabe J, and Yachi S 2013 FORUM: Sustaining ecosystem functions in a changing world: a call for an integrated approach Journal of Applied Ecology 50(5): 1124-1130 [link]
Hadly EA 2013 Ecology: Getting the word out on biosphere crisis Nature 497: 565 [link]
Anich PS and Hadly EA 2013 Asymmetrical Competition between Microtus montanus and Microtus longicaudus in the Greater Yellowstone Ecosystem American Midland Naturalist 170(2): 274-286 [link]
Brook CE, Bernstein DP, and Hadly EA 2013 Human food subsidies and Common Raven occurrence in Yosemite National Park, California Western Birds 44:127-134 [pdf]
Marcy AE, Fendorf S, Patton J, and Hadly EA 2013 Morphological Adaptations for Digging and Climate-Impacted Soil Properties Define Pocket Gopher (Thomomys spp.) Distributions PLoS ONE 8(5): e64935. doi:10.1371/journal.pone.0064935 [link]
Hadly EA, Barnosky AD, Hellmann JD, Gerber L 2013 Bridging the Science-to-Society Gap: Part 1 #reachingoutsci Nature Blog http://blogs.nature.com/soapboxscience/ 22 May 2013 | 10:01 BST [link]

Hellmann JJ, Bennett E, Gerber L, Hadly EA, Jahren H, and Wright D
2013 The Twenty-fifth Hour of the Day: Finding Time for Outreach: Part 2 #reachingoutsci Nature Blog http://blogs.nature.com/soapboxscience/ 23 May 2013 | 10:01 BST [link]
Gerber LR, Bennett E, Hadly EA, Hellmann JJ, Jahren AH, Wright D 2013 Unclogging institutional conduits between research and outreach: Part 3 #reachingoutsci Nature Blog http://blogs.nature.com/soapboxscience/ 24 May 2013 | 10:01 BST [link]
Barnosky AD and Hadly EA 2012 Foreword Paleontology in Ecology and Conservation Forward, ISBN: 978-3-642-25037-8
Karp D, Moeller HV, and Frishkoff LO 2012 Non-random extinction patterns can modulate pest-control service decline Ecological Applications In press [pdf]
Adams RI and Hadly EA 2012 Genetic diversity within vertebrate species is greater at lower latitudes Evolutionary Ecology DOI 10.1007/s10682-012-9587-x [pdf]
Barnosky AD, Hadly EA, Bascompte J, Berlow EL, Brown JH, Fortelius M, Getz WM, Harte J, Hastings A, Marquet PA, Martinez ND, Mooers A, Roopnarine P, Vermeij G, Williams JW, Gillespie RG, Kitzes J, Marshall C, Matzke N, Mindell DP, Revilla E, Smith AB 2012 Approaching a state-shift in Earth's biosphere Nature 486, 52-58 [pdf]
McMenamin SK and Hadly EA 2012 Ancient DNA Assessment of Tiger Salamander Population in Yellowstone National Park PLoS ONE 7(3): e32763. doi:10.1371/ journal.pone.0032763 [pdf]
Chan Y and Hadly EA 2011 Genetic variation over 10000 years in Ctenomys: comparative phylochronology provides a temporal perspective on rarity, environmental change and demography Molecular Ecology DOI: 10.1111/j.1365-294X.2011.05295 [pdf]
TERRY RC, LI C, and Hadly EA 2011 Predicting small-mammal responses to climatic warming: autecology, geographic range, and the Holocene fossil record Global Change Biology 17(10) pp.3019-3034. [pdf]
McMenamin SK and Hadly EA 2010 Developmental dynamics of Ambystoma tigrinum in a changing landscape BMC Ecology 10(10) [pdf]
Barnosky AD and Hadly EA 2010 Transforming conservation Issues in Science and Technology 27(1) pp.17-18 [pdf]
Adams RI and Hadly EA 2010 High levels of gene flow in the California vole (Microtus californicus) are consistent across spatial scales. Western North American Naturalist 70(3) pp.296-311 [pdf]
Pinsky ML, Newsome SD, Dickerson BR, Fang Y, van Tuinen M, Kennett DJ, Ream RR, Hadly EA 2010 Dispersal provided resilience to range collapse in a marine mammal: insights from the past to inform conservation biology Molecular Ecology 19(12):2418-2429 [pdf]
Blois JL, McGuire JL, Hadly EA. 2010 Small mammal diversity loss in response to late-Pleistocene climatic change Nature 465(7299):771-U5 [pdf]
Feranec RS, Hadly EA, Paytan A. 2010 Isotopes reveal limited effects of middle Pleistocene climate change on the ecology of mid-sized mammals. Quaternary International 217(1-2):43-52 [pdf]
O'Keefe K, Ramakrishnan U, van Tuinen M, Hadly EA. 2009 Source-sink dynamics structure a common montane mammal Molecular Ecology 18(23):4775-4789 [pdf]
Hadly EA, Spaeth PA, and LI C. 2009 Niche Conservatism Above the Species Level PNAS 106:19707-19714 [pdf]
Wake DB, Hadly EA, Ackerly DD 2009 Biogeography, changing climates, and niche evolution PNAS 106:19631-19636 [pdf]
Hadly EA, and Barnosky AD. 2009 Vertebrate fossils and the future of conservation biology. In Conservation Paleobiology: Using the Past to Manage for the Future The Paleontological Society Papers Volume 15, Gregory P. Dietl and Karl W. Flessa (eds.), pp. 39-59 [pdf]
Rominger AJ, Miller TEX, Collins SL. 2009 Relative contributions of neutral and niche-based processes to the structure of a desert grassland grasshopper community Oecologia 161:791-800 [pdf]
Ramakrishnan U and Hadly EA. 2009 Do complex population histories drive higher estimates of substitution rate in phylogenetic reconstruction? Molecular Ecology   [pdf]
Ramakrishnan U and Hadly EA. 2009 Using phylochronology to reveal cryptic population histories: Review and synthesis of four ancient DNA studies Invited review for Molecular Ecology   [pdf]
Feranec RS, Hadly EA, Paytan A. 2009 Stable isotopes reveal seasonal competition for resources between late Pleistocene bison (Bison) and horse (Equus) from Rancho La Brea, southern California Palaeogeography, Palaeoclimatology, Palaeoecology 271: 153-160 [pdf]
Spaeth P and Hadly EA. 2009 Phylogeography of Microtus longicaudus in the tectonically and glacially dynamic central Rocky Mountains Journal of Mammalogy 90(3): 571-584 [pdf]
Blois JL and Hadly EA. 2009 Mammalian response to Cenozoic climatic change Invited review for Annual Review of Earth and Planetary Sciences 7: 8.1-8.28 [pdf]
McMenamin SK, Hadly EA, Wright CK 2008 Climatic change and wetland desiccation cause amphibian decline in world's oldest national park Proceedings of the National Academy of Sciences 105: 16988-16993 [pdf]
Riddle BR, Dawson MN, Hadly EA, Hafner DJ, Hickerson MJ, Mantooth SJ, Yoder AD. 2008 The role of molecular genetics in sculpting the future of integrative biogeography Progress in Physical Geography 32: 173-202 [pdf]
van Tuinen M, O'Keefe K, Ramakrishnan U, Hadly EA 2008 Fire and ice: Genetic structure of the Uinta ground squirrel (Spermophilus armatus) across the Yellowstone hotspot Molecular Ecology 17: 1776-1788 [pdf]
Blois JL, Feranec RS, Hadly EA 2008 Environmental influences on spatial and temporal patterns of body-size variation in California ground squirrels Journal of Biogeography 35:602-613 [pdf]
Newsome SD, Etnier MA, Gifford-Gonzalez D, Phillips DL, van Tuinen M, Hadly EA, Costa DP, Kennett DJ, Guilderson TP, Koch PL 2007 The shifting baseline of northern fur seal ecology in the northeast Pacific Ocean PNAS 104(23): 9709-9714 [pdf]
Feranec RS, Hadly EA, Blois JL, Barnosky AD, and Paytan A 2007 Radiocarbon dates from the Pleistocene fossil deposits of Samwell Cave, Shasta County, California, USA Radiocarbon 49(1): 117-121 [pdf]
Feranec RS, Hadly EA, and Paytan A 2007 Determining landscape use of Holocene mammals using strontium isotopes Oecologia 153:943-950 [pdf]
Bruzgul JE and Hadly EA 2007 Non-random patterns in the Yellowstone ecosystem: inferences from mammalian body size, order and biogeographical affinity Global Ecology and Biogeography 16(2): 139-148 [pdf]
van Tuinen M, Stidham T, Hadly EA 2006 Tempo and mode of modern bird evolution observed with large-scale taxonomic sampling Historical Biology: A Journal of Paleobiology 18: 205-221 [pdf]
Chan YL, Anderson CNK, and Hadly EA 2006 Bayesian Estimation of the Timing and Severity of a Population Bottleneck from Ancient DNA. PLoS Genetics 2(4):e59 [pdf]
Chan YL, Lacey EA, Pearson OP, and Hadly EA 2005 Ancient DNA reveals Holocene loss of genetic diversity in a South American rodent Biology Letters 1(4):423-426 [pdf]
Bruzgul JE, Long W, and Hadly EA 2005 A Temporal Record of the Tiger Salamander (Ambystoma tigrinum) through 3,000 Years of Climatic Variation BMC Ecology 5:07 [pdf]
McGill BJ, Hadly EA, and Maurer BA 2005 Community inertia of Quaternary small mammal assemblages in North America PNAS 04(46):16701-16706 [pdf]
Ramakrishnan U, Hadly EA and Mountain J 2005 Detecting past population bottlenecks using temporal genetic data Molecular Ecology 14:2915-2922 [pdf]
Anderson CNK, Ramakrishnan U, Chan YL, Hadly EA 2005 Serial SimCoal: A population genetic model for data from multiple populations and points in time Bioinformatics 21:1733-1734 [pdf or download software]
van Tuinen M, Ramakrishnan U, and Hadly EA 2004 Studying the effect of environmental change on biotic evolution: past genetic contributions, current work and future directions Philosophical Transactions of the Royal Society of London, Physical Sciences 362:2795-2820 [pdf]
van Tuinen M, and Hadly EA 2004 Error in estimation of rate and time inferred from the early amniote fossil record and avian molecular clocks. J. Molecular Evolution 59(2): 267-276 [pdf]
Maurer BA, Brown JH, Dayan T, Enquist BJ, Ernest SKM, Hadly EA, Haskell JP, Jablonski D, Jones KE, Kaufman DM, Lyons SK, Niklas KJ, Porter WP, Roy K, Smith FA, Tiffney B, and Willig MR 2004 Similarities in body size distributions of small-bodied flying vertebrates Evolutionary Ecology Research 6:783-797 [pdf]
Webb DS, Graham RW, Barnosky AD, Bell CJ, Franz R, Hadly EA, Lundelius Jr EL, McDonald HG, Martin RA, Semkin Jr HA,Steadman DW 2004 Vertebrate Paleontology Developments in Quaternary Science 1:519-538 [pdf]
Hadly EA, Ramakrishnan U, Chan YL, van Tuinen M, O'Keefe K, Spaeth P, Conroy CJ 2004 Genetic response to climatic change: Insights from ancient DNA and phylochronology PLoS Biology 2(10):e290 [pdf]
van Tuinen M, and Hadly EA 2004 Calibration and error in placental molecular clocks: a conservative approach using the Cetartiodactyl fossil record. J Heredity 95:200-208 [pdf]
Smith FA, Brown JH, Haskell JP, Lyons SK, Alroy J, Charnov EL, Dayan T, Enquist BJ, Ernest SKM, Hadly EA, Jones KE, Kaufman DM, Marquet PA, Maurer BA, Niklas KJ, Porter WP, Tiffney B, and Willig MR 2004 Similarity of Mammalian Body Size across the Taxonomic Hierarchy and across Space and Time American Naturalist 163(5):672-691 [pdf]
Hadly EA 2003 The Interface of Paleontology and Mammalogy: Past, Present, and Future Journal of Mammalogy 84(2):347-353 [pdf]
Hadly EA, van Tuinen M, Chan Y, Heiman K 2003 Ancient DNA evidence of prolonged population persistence with negligible genetic diversity in an endemic tuco-tuco (Ctenomys sociabilis) Journal of Mammalogy 84(2):403-417 [pdf]
Porder S, Paytan A, Hadly EA 2003 Mapping the origin of faunal assemblages using strontium isotopes Paleobiology 29(2):197-204 [pdf]
Barnosky AD, Hadly EA, Bell CJ 2003 Mammalian response to global warming on varied temporal scales Journal of Mammalogy 84(2):354-368 [pdf]
Ernest SK, Enquist BJ, Brown JH, Charnov EL, Gilooly JF, Savage VM, White EP, Smith FA, Hadly EA, Haskell JP, Lyons SK, Maurer BA, Niklas KJ, Tiffney B 2003 Thermodynamic and metabolic effects on the scaling of production and population energy use Ecology Letters 6: 990-995 [pdf]
Barnosky AD, Hadly EA, Maurer BA, Christie MI 2001 Temperate Terrestial Vertebrate Faunas in North and South America: Interplay of Ecology, Evolution, and Geography with Biodiversity Conservation Biology 15:658-674 [pdf]
Hadly EA and Maurer BA 2001 Spatial and temporal patterns of species diversity in montane mammal communities of western North America Evolutionary Ecology Research 3:477-486 [pdf]
Hadly EA 1999 Fidelity of terrestrial vertebrate fossils to a modern ecosystem Paleogeography, Paleoclimetology, Paleoecology 149:389-409 [pdf]
Hadly EA, Kohn MH, Leonard JA, and Wayne RK 1998 A genetic record of population isolation in pocket gophers during Holocene climatic change Proceedings of the National Academy of Sciences 95:6893-689 [pdf]
Hadly EA 1997 Evolutionary and ecological response of pocket gophers (Thomomys talpoides) to late-Holocene climate change Biological Journal of the Linnean Society 60:227-296 [pdf]
Hadly EA 1996 Influence of Late Holocene Climate on Northern Rocky Mountain Mammals Quaternary Research 46:298-310 [pdf]
Barnosky E Hadly 1994 Ecosystem dynamics through the past 2000 years as revealed by fossil mammals from Lamar Cave in Yellowstone National Park, USA Historical Biology 8: 71-90.  
Anderson RS, Smith S, Rothstein D, Murray L, Hadly EA, Force C, Diveley-White S 1989 The mid- and late-Wisconsin pollen stratigraphy of Potato Lake, Coconino County, Arizona Current Research in the Pleistocene 6: 51-54.  

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