Columbia subject headings:
Social problems.
United States--Economic conditions--1918-1945.
United States--Social conditions--1918-1932.
Harvard subject headings:
African Americans
Social problems
United States--Economic conditions--1918-1945.
United States--Race relations
United States--Social conditions--1918-1932.
United States--Social conditions.
Princeton subject headings:
African Americans.
United States--Race relations.
United States--Social conditions.