Columbia subject headings:
Caliphate--Early works to 1800.
Caliphs--Early works to 1800.
Muḥammad, Prophet, -632--Companions.
Muḥammad, Prophet, -632--Family.
Harvard subject headings:
Caliphate--Early works to 1800.
Caliphs--Early works to 1800.
Muḥammad, Prophet, -632--Companions.
Muḥammad, Prophet, -632--Family.
Princeton subject headings:
Caliphate--Early works to 1800.
Caliphs--Early works to 1800.
Muḥammad, Prophet, -632--Companions.
Muḥammad, Prophet, -632--Family.