Columbia subject headings:
Communism--Congresses.
Gramsci, Antonio, 1891-1937--Congresses.
Gramsci, Antonio, 1891-1937--Influence--Congresses.
Political science--Philosophy--Congresses.
Harvard subject headings:
Gramsci, Antonio, 1891-1937--Political and social views--Congresses.
Princeton subject headings: