Columbia subject headings:
Employees--Training of--Germany--History--20th century.
Labor unions and youth--Germany--History--20th century.
Vocational education--Germany--History--20th century.
Youth--Employment--Germany--History--20th century.
Harvard subject headings:
Employees--Training of--Germany--History--20th century.
Labor unions and youth--Germany--History--20th century.
Vocational education--Germany--History--20th century.
Youth--Employment--Germany--History--20th century.
Princeton subject headings:
Labor unions and youth--Germany--History.
Labor unions--Germany--History.
Youth movements--Germany--History.
Youth--Employment--Germany.