Columbia subject headings:
Harvard subject headings:
Teachers--Training of--Germany--Schleswig-Holstein--History--18th century.
Teachers--Training of--Germany--Schleswig-Holstein--History--19th century.
Teachers--Training of--Germany--Schleswig-Holstein--History--20th century.
Princeton subject headings:
Teachers--Training of--Germany (West)--Schleswig-Holstein--History--18th century.
Teachers--Training of--Germany (West)--Schleswig-Holstein--History--19th century.
Teachers--Training of--Germany (West)--Schleswig-Holstein--History--20th century.