Columbia subject headings:
Ethnology--Europe--Congresses.
Europe--Politics and government--1945---Congresses.
Europe--Social conditions--20th century--Congresses.
Minorities--Europe--Congresses.
Harvard subject headings:
Ethnology--Europe--Congresses
Europe--Politics and government--1945---Congresses.
Europe--Social conditions--20th century--Congresses.
Minorities--Europe--Congresses
Princeton subject headings:
Ethnology--Europe--Congresses.
Europe--Politics and government--1945---Congresses.
Europe--Social conditions--20th century--Congresses.
Minorities--Europe--Congresses.