Holcroft, A.C.; Herrero, S. 1991. Black bear, Ursus americanus, food habits in southwestern Alberta. The Canadian Field-Naturalist. 105(3): 335-345.

Holcroft, A.C.; Herrero, S. 1991. Black bear, Ursus americanus, food habits in southwestern Alberta. The Canadian Field-Naturalist. 105(3): 335-345.