Attributes / relations provided by
♦ 1Tamias amoenus, Dallas A. Sutton, MAMMALIAN SPECIES No. 390, pp. 1-8 (1992)
♦ 2Spermophilus brunneus, Eric Yensen and Paul W. Sherman, MAMMALIAN SPECIES No. 560, pp. 1-5 (1997)
♦ 3Spermophilus columbianus, Charles L. Elliott and Jerran T. Flinders, MAMMALIAN SPECIES No. 372, pp. 1-9 (1991)
♦ 4Spermophilus elegans, David A. Zegers, Mammalian Species No. 214, pp. 1-7 (1984)