Columbia subject headings:
Blum, Léon, 1872-1950.
France--Politics and government--1914-1940.
Parti socialiste-S.F.I.O.
Socialism--France.
Harvard subject headings:
Blum, Léon, 1872-1950.
France--Politics and government--1914-1940.
Front populaire
Parti socialiste (France)
Parti socialiste-S.F.I.O.
Political parties--France--History--20th century.
Socialism--France--20th century.
Socialism--France--History--20th century
Princeton subject headings: