1. Economic discrimination and Negro increase;Blalock H. M.;American Sociological Review,1956
2. Burgess, E. (1925). The growth of the city: Introduction to a research project. In R. E. Park, E. W. Burgess, & R. D. McKenzie (Eds.), The city (pp. 47–62). University of Chicago Press.
3. Chicago Housing Conditions, VI: The Problem of the Negro
4. The Rise and Decline of the American Ghetto
5. Drake, S. C., & Cayton, H. (1945). Black metropolis: A study of Negro life in a northern city. Harcourt, Brace & Company.