Columbia subject headings:
Harvard subject headings:
Administrative and political divisions--History--20th century--Congresses.
Ethnic groups--Europe, Eastern--History--20th century--Congresses.
Ethnopsychology--Europe, Eastern--History--20th century--Congresses.
Europe, Eastern--History--20th century--Congresses.
Partition, Territorial--History--20th century--Congresses.
Transborder ethnic groups--Europe, Eastern--History--20th century--Congresses.
Princeton subject headings:
Administrative and political divisions--History--20th century--Congresses.
Ethnic groups--Europe, Eastern--History--20th century--Congresses.
Ethnopsychology--Europe, Eastern--History--20th century--Congresses.
Europe, Eastern--History--20th century--Congresses.
Partition, Territorial--History--20th century--Congresses.
Transborder ethnic groups--Europe, Eastern--History--20th century--Congresses.