Bergerud, Arthur T. (October 1974). "Decline of Caribou in North America Following Settlement". The Journal of Wildlife Management. 38 (4): 757–770. doi:10.2307/3800042. JSTOR3800042.
Bergerud, Arthur T. (October 1974). "Decline of Caribou in North America Following Settlement". The Journal of Wildlife Management. 38 (4): 757–770. doi:10.2307/3800042. JSTOR3800042.