Columbia subject headings:
Harvard subject headings:
Agricultural colleges--Germany--History.
Agriculture and state--Germany--History.
Agriculture and state--Study and teaching (Higher)--Germany--History.
Agriculture--Economic aspects--Germany--History.
Agriculture--Economic aspects--Study and teaching (Higher)--Germany--History.
Agriculture--Study and teaching (Higher)--Germany--History.
Princeton subject headings:
Agriculture and politics--Germany.
Agriculture and state--Germany--History.
Agriculture--Economic aspects.