Columbia subject headings:
Harvard subject headings:
Housing policy--Germany--History--19th century.
Housing policy--Germany--History--20th century.
Housing--Germany--History--19th century.
Housing--Germany--History--20th century.
Princeton subject headings:
Housing policy--Germany--History--19th century.
Housing policy--Germany--History--20th century.
Housing--Germany--History--19th century.
Housing--Germany--History--20th century.