1. Black Inventors;Aaseng,1997
2. Great Negroes Past and Present;Adams,1964
3. “Birds of a feather — better together?: Exploring the optimal spatial distribution of ethnic inventors,”;Agarwal,2007
4. The evolution of black-owned banks in the United States between the 1880s and the 1990s;Ammons;Journal of Black Studies,1996
5. A Documentary History of the Negro People in the United States;Aptheker,1951