Columbia subject headings:
Europe, Central--Civilization--20th century--Congresses.
Europe, Central--Cultural policy--Congresses.
Europe, Eastern--Civilization--20th century--Congresses.
Europe, Eastern--Cultural policy--Congresses.
Harvard subject headings:
Europe, Central--Civilization--20th century--Congresses.
Europe, Central--Cultural policy--Congresses.
Europe, Eastern--Civilization--20th century--Congresses.
Europe, Eastern--Cultural policy--Congresses.
Princeton subject headings:
Europe, Central--Civilization--20th century--Congresses.
Europe, Central--Cultural policy--Congresses.
Europe, Eastern--Civilization--20th century--Congresses.
Europe, Eastern--Cultural policy--Congresses.