Columbia subject headings:
Dialectic.
Dialectical materialism.
History--Philosophy.
Philosophy, Marxist.
Harvard subject headings:
Communism--Congresses
Dialectic--Congresses.
Dialectical materialism--Congresses.
Historical materialism--Congresses.
History--Philosophy--Congresses
Materialism--Congresses.
Philosophy, Marxist--Congresses.
Princeton subject headings:
Dialectic--Congresses.
Dialectical materialism--Congresses.
History--Philosophy--Congresses.
Philosophy, Marxist--Congresses.