Columbia subject headings:
Harvard subject headings:
Adult education--Germany--History--20th century.
Community colleges--Germany--History--20th century.
Democracy--Germany--History--20th century
Education and state--Germany--History--20th century.
High schools--Germany--History--20th century.
Princeton subject headings:
Adult education--Germany--History--20th century.
Community colleges--Germany--History--20th century.
Democracy--Germany--History--20th century.
Education and state--Germany--History--20th century.
High schools--Germany--History--20th century.