Columbia subject headings:
Distributive education--United States--History.
Vocational education--Law and legislation--United States--History.
Vocational education--United States--History.
Harvard subject headings:
Distributive education--United States--History.
Vocational education--Law and legislation--United States--History.
Vocational education--United States--History.
Princeton subject headings:
Distributive education--United States--History.
Vocational education--Law and legislation--United States--History.
Vocational education--United States--History.