Columbia subject headings:
Harvard subject headings:
Agriculture--Social aspects--Germany--Hamburg.
Crofters--Germany--Hamburg--History.
Hamburg (Germany)--Social conditions.
Social classes--Germany--Hamburg--History.
Princeton subject headings:
Agriculture--Social aspects--Germany (West)--Hamburg.
Crofters--Germany (West)--Hamburg--History.
Hamburg (Germany)--Social conditions.
Social classes--Germany (West)--Hamburg--History.