This directory of materials gives the location, nature, and quantity of the holdings of over 2100 private and public organizations, institutes, and libraries in the United States which collect information on Afro-Americans. Information on the 5300 collections listed was gathered through the use of a questionnaire circulated in 1968-69. Most of the holdings are primary rather than secondary, consequently, the directory gives the persons to contact, addresses of the centers, publications of the centers, any services of the center, personal papers collections, and something about each organization in terms of its purposes, funding, leadership, etc. The directory is arranged by states with the cities, college libraries, or appropriate centers listed alphabetically. (CWB)