Hammitt, William E., Judy N. Dulin, and G. R. Wells. "Determinants of Quality Wildlife                        Viewing in Great Smoky Mountains National Park." Wildlife Society                        Bulletin 21, no. 1 (1993): 21-30.

Dulin, Judy N.. Determinants of Quality Wildlife Viewing in Cades Cove, Great Smoky Mountains National Park In Forestry. Knoxville, TN: University of Tennessee , 1990.