Columbia subject headings:
Parti socialiste-S.F.I.O.--History--20th century.
Political activists--France--History--20th century.
Political violence--France--History--20th century.
Protest movements--France--History--20th century.
Socialists--France--History--20th century.
Harvard subject headings:
France--Politics and government--1914-1940.
Parti socialiste-S.F.I.O.--History.
Socialism--France--20th century.
Vigilance committees--France--History--20th century.
Princeton subject headings:
Parti socialiste-S.F.I.O.--History--20th century.
Political activists--France--History--20th century.
Political violence--France--History--20th century.
Protest movements--France--History--20th century.
Socialists--France--History--20th century.