Efforts for social betterment among negro Americans report of a social study made by Atlanta University under the patronage of the trustees of the John F. Slater fund ; together with the proceedings of the 14th annual Conference for the Study of the Negro Problems, held at Atlanta University, on Tuesday, May the 24th, 1909 - Du Bois, William E. B. 1868-1963 (Arno Press [u.a.], 1969)