Columbia subject headings:
Harvard subject headings:
Agricultural colleges--Germany--History--19th century.
Agricultural colleges--Germany--History--20th century.
Agricultural education--Germany--History--19th century.
Agricultural education--Germany--History--20th century.
Polish students--Germany--History--19th century.
Polish students--Germany--History--20th century.
Princeton subject headings:
Agricultural education--Germany--History.
Agricultural students--Germany.
Agricultural students--Poland.
Agriculture--Study and teaching--Germany.
Polish students--Germany.