Columbia subject headings:
Bulgaria--Civilization--Turkish influences.
Hungary--Civilization--Turkish influences.
Romania--Civilization--Turkish influences.
Harvard subject headings:
Bulgaria--Civilization--Turkish influences.
Danube River Valley--History.
Hungary--Civilization--Turkish influences
Romania--Civilization--Turkish influences.
Princeton subject headings:
Bulgaria--Civilization--Turkish influences.
Danube River Valley--History.
Hungary--Civilization--Turkish influences.
Romania--Civilization--Turkish influences.