Attributes / relations provided by
♦ 1Microtus townsendii, John E. Cornely and B. J. Verts, MAMMALIAN SPECIES No. 325, pp. 1-9 (1988)
♦ 2Spermophilus franklinii, Andrea C. Ostroff and Elmer J. Finck, MAMMALIAN SPECIES No. 724, pp. 15 (2003)
♦ 3Sylvilagus audubonii, Joseph A. Chapman and Gale R. Willner, MAMMALIAN SPECIES No. 106, pp. 1-4 (1978)
♦ 4Spermophilus beldingi, Stephen H. Jenkins and Bruce D. Eshelman, Mammalian Species No. 221, pp. 1-8 (1984)
♦ 5Spermophilus richardsonii, Gail R. Michener and James W. Koeppl, Mammalian Species No. 243, pp. 1-8, (1985)