Columbia subject headings:
Harvard subject headings:
Alienation (Social psychology)--Congresses.
Communism--Congresses
Marx, Karl, 1818-1883--Political and social views--Congresses.
Philosophy, Marxist--Congresses.
Princeton subject headings:
Alienation (Social psychology)--Congresses.
Communism--Congresses.
Marx, Karl, 1818-1883--Political and social views--Congresses.
Philosophy, Marxist--Congresses.