Mills, H.B. 1937. A preliminary study of the bighorn of Yellowstone National Park. Journal of Mammalogy. 18(2): 205-212.
Mills, H.B. 1937. A preliminary study of the bighorn of Yellowstone National Park. Journal of Mammalogy. 18(2): 205-212.
Western Forbs
Mills, H.B. 1937. A preliminary study of the bighorn of Yellowstone National Park. Journal of Mammalogy. 18(2): 205-212.