Columbia subject headings:
Germany--Economic conditions--1918-1945.
Industrial relations--Germany--History--20th century.
Labor unions--Germany--History--20th century.
Zentralarbeitsgemeinschaft--History--20th century.
Harvard subject headings:
Germany--Economic conditions--1918-1945.
Industrial relations--Germany--History--20th century.
Labor unions--Germany--History--20th century
Zentralarbeitsgemeinschaft--History--20th century.
Princeton subject headings:
Industries--Germany--History--20th century.
Labor unions--Germany--History--20th century.
Labor unions--Germany--Political activity--History.
Zentralarbeitsgemeinschaft der industriellen und gewerblichen Arbeitgeber und Arbeitnehmer Deutschlands.