Key, David McKendree
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U.S. District Court, Eastern District of Tennessee (1880-1895)
U.S. District Court, Middle District of Tennessee (1880-1895)
American National Biography.
Dictionary of American Biography.
Abshire, David M. The South Rejects a Prophet: The Life of Senator D. M. Key, 1824-1900. New York: F. A. Praeger, 1967.
Lowitt, Richard, ed. "David M. Key Views the Legal and Political Status of the Negro in 1885." Journal of Negro History 54 (July 1969): 285-93.