Columbia subject headings:
Belene (Bulgaria)--Ethnic relations.
Bulgaria--Politics and government--20th century.
Muslims--Bulgaria--Belene.
Thrace, Western (Greece)--Ethnic relations.
Thrace, Western (Greece)--History.
Harvard subject headings:
Belene (Bulgaria)--Ethnic relations.
Bulgaria--Politics and government--20th century.
Muslims--Bulgaria--Belene.
Muslims--Poland.
Tatars--Poland.
Thrace, Western (Greece)--Ethnic relations.
Thrace, Western (Greece)--History.
Turks--Bulgaria
Turks--Greece--Thrace, Western.
Princeton subject headings:
Belene (Bulgaria)--Ethnic relations.
Bulgaria--Politics and government--20th century.
Muslims--Bulgaria--Belene.
Thrace, Western (Greece)--Ethnic relations.
Thrace, Western (Greece)--History.