Columbia subject headings:
Harvard subject headings:
Communism and philosophy--Congresses.
Dialectical materialism--Congresses.
Historical materialism--Congresses.
Logic--Congresses
Political science--Philosophy--Congresses
Princeton subject headings:
Communism and philosophy--Congresses.
Dialectical materialism--Congresses.
Historical materialism--Congresses.
Logic--Congresses.
Political science--Philosophy--Congresses.