Rogers, Fred B. (December 1964). "Martha Tracy (1876–1942): Exceptional Woman of Public Health". Archives of Environmental Health. 9 (6): 819–821. doi:10.1080/00039896.1964.10663931. PMID14203108.
Rogers, Fred B. (December 1964). "Martha Tracy (1876–1942): Exceptional Woman of Public Health". Archives of Environmental Health. 9 (6): 819–821. doi:10.1080/00039896.1964.10663931. PMID14203108.