Columbia subject headings:
Harvard subject headings:
Education and state--Germany--Prussia--History--19th century.
Trade schools--Germany--Prussia--History--19th century.
Vocational education--Germany--Prussia--History--19th century.
Princeton subject headings:
Education and state--Germany--Prussia--History--19th century.
Trade schools--Germany--Prussia--History--19th century.
Vocational education--Germany--Prussia--History--19th century.