Columbia subject headings:
Communism--Congresses.
International business enterprises--Congresses.
International business enterprises--Social aspects--Congresses.
Marxian economics--Congresses.
Working class--Europe--Congresses.
Harvard subject headings:
Communism--Congresses
International business enterprises--Congresses
International business enterprises--Social aspects--Congresses.
Labor--Europe--Congresses.
Marxian economics--Congresses.
Working class--Europe--Congresses.
Princeton subject headings: