Columbia subject headings:
Harvard subject headings:
Germany--Intellectual life--20th century--Congresses.
Germany--Relations--Russia--Congresses.
Germany--Relations--Soviet Union--Congresses.
Russia--Intellectual life--20th century--Congresses.
Russia--Relations--Germany--Congresses.
Soviet Union--Intellectual life--Congresses.
Soviet Union--Relations--Germany--Congresses.
Princeton subject headings:
Germany--Intellectual life--20th century--Congresses.
Germany--Relations--Russia--Congresses.
Germany--Relations--Soviet Union--Congresses.
Russia--Intellectual life--20th century--Congresses.
Russia--Relations--Germany--Congresses.
Soviet Union--Intellectual life--Congresses.
Soviet Union--Relations--Germany--Congresses.