Columbia subject headings:
Harvard subject headings:
Bloch, Ernst, 1885-1977--Congresses.
Communism--Philosophy--History--20th century--Congress.
Communism--Soviet Union--History--Congresses.
Conference papers and proceedings
Lukács, György, 1885-1971--Congresses.
Russia--History--February Revolution, 1917--Congresses.
Princeton subject headings:
Bloch, Ernst, 1885-1977--Congresses.
Communism--Philosophy--History--20th century--Congress.
Communism--Soviet Union--History--Congresses.
Conference papers and proceedings.
Lukács, György, 1885-1971--Congresses.
Russia--History--February Revolution, 1917--Congresses.