Columbia subject headings:
Anarchism--History--20th century--Sources.
International Congress of Anarchist Federations (1st : 1968 : Carrara, Italy)--History--Sources.
International of anarchist federations--History--Sources.
Harvard subject headings:
Anarchism--Congresses.
International Congress of Anarchist Federations (1968 : Carrara, Italy)
Princeton subject headings: