Columbia subject headings:
Europe--Politics and government--20th century--Congresses.
Fascism--Europe--Congresses.
France--Politics and government--Congresses.
Popular fronts--Europe--C.
Socialism--Europe--Congresses.
Harvard subject headings:
Europe--Politics and government--20th century--Congresses.
Fascism--Europe--Congresses.
France--Politics and government--Congresses.
Popular fronts--Europe--C
Popular fronts--Europe--Congresses.
Socialism--Europe--Congresses
Princeton subject headings: