Columbia subject headings:
Harvard subject headings:
Depressions--1929--Germany.
Germany--Economic conditions--1918-1945
Germany--History--1933-1945
Migrant labor--Germany--History--20th century.
Migration, Internal--Germany--History--20th century.
Princeton subject headings:
Depressions--1929--Germany.
Germany--Economic conditions--1918-1945.
Germany--History--1933-1945.
Migrant labor--Germany--History--20th century.
Migration, Internal--Germany--History--20th century.