Columbia subject headings:
Harvard subject headings:
Carl-Zeiss-Stiftung (Heidenheim an der Brenz, Germany)
Demography--Germany--History--20th century.
Germany (West)--Politics and government.
Germany--Economic conditions--20th century.
Germany--Social conditions--20th century.
Migration, Internal--Germany--History--20th century.
Princeton subject headings:
Germany (East)--History.
Germany (East)--Social conditions.
Germany--History--1945-1990.
Germany--Social conditions--20th century.