Columbia subject headings:
Agriculture--Economic aspects--Germany--History.
Germany--Population--History.
Thirty Years' War, 1618-1648.
Harvard subject headings:
Agriculture--Economic aspects--Germany
Agriculture--Economic aspects--Germany--History.
Germany--Population--History.
Germany--Population.
Thirty Years' War, 1618-1648.
Princeton subject headings:
Agriculture--Economic aspects--Germany--History.
Germany--Population--History.
Thirty Years' War, 1618-1648.