Columbia subject headings:
Harvard subject headings:
Agricultural high schools--Germany--History.
Agriculture--Study and teaching--Germany--History.
Verband Ländlicher Heimvolkshochschulen Deutschlands--History.
Princeton subject headings:
Agricultural high schools--Germany--History.
Agriculture--Study and teaching--Germany--History.
Verband Ländlicher Heimvolkshochschulen Deutschlands--History.