R. Schneider

Comparison of the cancer deaths in the black and white U.S.A. population from 1949 to 1967.

C. H. Mason, U. Henschke, L. D. Leffall, 1972, The Medical annals of the District of Columbia.

Is there a genetic basis for the differences in cancer incidence between Afro-Americans and Euro-Americans?

L. D. Leffall, A. Goldson, R. Schneider, 1981, Journal of the National Medical Association.

Alarming increase of the cancer mortality in the u.s. black population (1950–1967)

C. H. Mason, U. Henschke, L. D. Leffall, 1973, Cancer.