Evaluation of methods to inventory and monitor mammalian carnivores in Yellowstone
Crabtree, R.L., Gehman, S. and Robinson, B.
in: A. P. Curlee, A.-M. Gillesberg, and D. Casey, editors. Greater Yellowstone Predators: Ecology and Conservation in a Changing Landscape: Proceedings of the Third Biennial Conference on the Greater Yellowstone Ecosystem. September 24-27, 1995, Yellowstone National Park. Northern Rockies Conservation Cooperative, Yellowstone National Park, Wyoming, USA, pp. 191-192