Columbia subject headings:
Harvard subject headings:
Foundry workers--Germany--History.
Fried. Krupp AG--History.
Germany--Social conditions--1933-1945.
Gutehoffnungshütte--History.
Princeton subject headings:
Foundry workers--Germany--History--20th century.
Fried. Krupp AG.
Iron industry and trade--Germany--History--20th century.
National socialism.