Columbia subject headings:
Bektashi--History.
Sufism--Turkey--History.
Turkey--Ethnic relations.
Turkmen--Turkey--History.
Harvard subject headings:
Bektashi--History.
Sufism--Turkey--History
Turkey--Ethnic relations.
Turkmen--Turkey--History.
Princeton subject headings:
Bektashi--History.
Sufism--Turkey--History.
Turkey--Ethnic relations.
Turkmen--Turkey--History.