Columbia subject headings:
African Americans--Economic conditions.
African Americans--Social conditions.
Migration, Internal--United States.
Rural-urban migration--United States.
United States--Social conditions.
Harvard subject headings:
African Americans--Economic conditions
African Americans--Social conditions
Migration, Internal--United States
Rural-urban migration--United States
United States--Social conditions.
Princeton subject headings:
African Americans--Economic conditions.
African Americans--Social conditions.
Migration, Internal--United States.
Rural-urban migration--United States.
United States--Social conditions.