Columbia subject headings:
Fatimites--Early works to 1800.
Imamate--Early works to 1800.
Islam--Customs and practices--Early works to 1800.
Ismailites--Doctrines--Early works to 1800.
Prayer--Islam--Early works to 1800.
Shīʿah--Doctrines--Early works to 1800.
Harvard subject headings:
Princeton subject headings:
Islam--Customs and practices--Early works to 1800.
Prayer--Islam--Early works to 1800.