Columbia subject headings:
Zaydīs.
Harvard subject headings:
Imamate--Early works to 1800.
Islam and state--Early works to 1800.
Shīʻah--Doctrines--Early works to 1800.
Princeton subject headings:
Imamate--Early works to 1800.
Islam and state--Early works to 1800.
Shīʻah--Doctrines--Early works to 1800.