Columbia subject headings:
Harvard subject headings:
Education, Elementary--Germany--History--19th century.
Education, Elementary--Germany--History--20th century.
Education, Rural--Germany--History--19th century.
Education, Rural--Germany--History--20th century.
Peasants--Germany--History--19th century.
Peasants--Germany--History--20th century.
Princeton subject headings:
Education, Preschool--Germany.
Education, Rural--Germany.
Education--Germany--Finance.