Columbia subject headings:
Race discrimination--Economic aspects--United States.
Race discrimination--Political aspects--United States.
United States--Economic conditions.
United States--Race relations.
Working class--United States.
Harvard subject headings:
Race discrimination--Economic aspects--United States.
Race discrimination--Political aspects--United States.
United States--Economic conditions.
United States--Race relations
Working class--United States
Princeton subject headings:
Race discrimination--Economic aspects--United States.
Race discrimination--Political aspects--United States.
United States--Economic conditions.
United States--Race relations.