Mortality among southern Negroes since 1920. With comparative data for southern whites and northern Negroes. United States Public Health Service; prepared by direction of the surgeon general.
出版资料
Washington, U.S. Govt. Print. Off., 1937.
复本
载体形态
52 p. illus. 23 cm.
丛编
United States Public health service. Public health bulletin, no. 235
With:
Bound with: Dental survey of school children, ages 6-14 years made in 1933-34 in 26 states.
