Columbia subject headings:
Harvard subject headings:
Europe, Eastern--Social conditions--Congresses.
Knowledge, Sociology of--Congresses.
Mannheim, Karl, 1893-1947--Congresses.
Mannheim, Karl, 1893-1947--Influence--Congresses.
Sociology--Germany--History--20th century--Congresses.
Sociology--Research--Europe, Eastern--Congresses.
Princeton subject headings:
Europe, Eastern--Social conditions--Congresses.
Mannheim, Karl, 1893-1947--Congresses.
Mannheim, Karl, 1893-1947--Influence--Congresses.