Attributes / relations provided by
♦ 1Microtus californicus (Rodentia: Cricetidae), NICHOLE L. CUDWORTH AND JOHN L. KOPROWSKI, MAMMALIAN SPECIES 42(868):230–243 (2010)
♦ 2Feeding ecology of North American gopher snakes (Pituophis catenifer, Colubridae), JAVIER A. RODRÍGUEZ-ROBLES, Biological Journal of the Linnean Society, 2002, 77, 165183
♦ 3Microtus montanus, Wendy E. Sera and Cathleen N. Early, MAMMALIAN SPECIES No. 716, pp. 110 (2003)