The Union Pacific reported 3,000 cars of livestock shipped in 1875.
Tenth Census of the United States, 1880, vol. 3, Agriculture (Washington D.C.: GPO, 1883), 141.
Report to the Stockholders of the Union Pacific Railroad for the Year 1875 (Boston, 1876), 5.
Eugene Mather, "The Production and Marketing of Wyoming Beef Cattle," Economic Geography 26 (April 1950): 82.
