Columbia subject headings:
France--Politics and government--1914-1940.
Labor unions--France--History.
Socialism--France--History.
Harvard subject headings:
France--Politics and government--1914-1940.
Labor unions--France--History
Socialism--France
Socialism--France--History
Princeton subject headings:
France--Politics and government--1914-1940.
Labor unions--France--History.
Socialism--France--History.