Klein, Mary L., Stephen R. Humphrey, and H. Franklin Percival. "Effects of Ecotourism on Distribution of Waterbirds in a Wildlife Refuge." Conservation Biology 9/6 (2002): 1454-1465.

Klein, Mary L., Stephen R. Humphrey, and H. Franklin Percival. "Effects of Ecotourism on Distribution of Waterbirds in a Wildlife Refuge." Conservation Biology 9/6 (2002): 1454-1465.