Columbia subject headings:
Khurāsān (Iran)--History.
Tribes--Iran--Khurāsān--History.
Harvard subject headings:
Princeton subject headings:
Arabs--Iran--Khurāsān (Province)--History.
Ethnology--Iran--Khurāsān (Province).
Khurāsān (Iran : Province)--History.
Khurāsān (Iran)--Ethnic relations.