Columbia subject headings:
Adult education--United States--History.
African Americans--Education--History.
African Americans--Vocational education--History.
Harvard subject headings:
Adult education--United States--History.
African Americans--Education--United States--History.
African Americans--Vocational education--United States--History.
Princeton subject headings:
Adult education--United States--History.
African Americans--Education--United States--History.
African Americans--Vocational education--United States--History.