Columbia subject headings:
Islamic sects--Iran.
Mashhad (Iran)--Religious life and customs.
Muslim pilgrims and pilgrimages--Iran--Mashhad.
Shīʻah--Customs and practices.
ʻAlī al-Riḍā ibn Mūsá, -818 or 819.
Harvard subject headings:
Mashhad (Iran)--Religious institutions.
Mashhad (Iran)--Social conditions.
Muslim pilgrims and pilgrimages--Iran--Mashhad.
Shiite shrines--Iran--Mashhad.
ʻAlī al-Riḍā ibn Mūsá, -818 or 819--Cult.
Princeton subject headings:
Islamic sects--Iran.
Mashhad (Iran)--Religious life and customs.
Muslim pilgrims and pilgrimages--Iran--Mashhad.
Shīʻah--Customs and practices.
ʻAlī al-Riḍā ibn Mūsá, -818 or 819.