Columbia subject headings:
Harvard subject headings:
Forced labor--Germany--Thuringia--History--20th century.
Underground factories--Germany--Thuringia--History.
Weapons industry--Germany--Thuringia--History.
World War, 1939-1945--Conscript labor--Germany--Thuringia.
Princeton subject headings:
Forced labor--Germany--Thuringia--History--20th century.
Underground factories--Germany--Thuringia--History.
Weapons industry--Germany--Thuringia--History.
World War, 1939-1945--Conscript labor--Germany--Thuringia.