Columbia subject headings:
Harvard subject headings:
Vocational education--Germany--History--19th century--Sources.
Vocational education--Germany--History--20th century--Sources.
Vocational education--Law and legislation--Germany.
Princeton subject headings:
Vocational education--Germany--History--19th century--Sources.
Vocational education--Germany--History--20th century--Sources.
Vocational education--Law and legislation--Germany.