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♦ 1SPECIES ASSESSMENT FOR PYGMY RABBIT (BRACHYLAGUS IDAHOENSIS) IN WYOMING, DOUGLAS A. KEINATH AND MATTHEW MCGEE, United States Department of the Interior Bureau of Land Management Wyoming State Office Cheyenne, Wyoming (2004)
♦ 2The Sagebrush Sea by
Cornell Lab of Ornithology♦ 3Spermophilus brunneus, Eric Yensen and Paul W. Sherman, MAMMALIAN SPECIES No. 560, pp. 1-5 (1997)
♦ 4Spermophilus richardsonii, Gail R. Michener and James W. Koeppl, Mammalian Species No. 243, pp. 1-8, (1985)