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Williams, Morris D.. "Yellow-Crowned Night Heron:  A New Breeding Species for the Great Smoky Mountains National Park." The Migrant 49, no. 4 (1978): 81-82.

Williams, Morris D.. "First Breeding Record of the Black Vulture in the Great Smoky Mountains National Park." Migrant 48, no. 1 (1977): 11-12.