Columbia subject headings:
Ikhwān al-Ṣafāʼ.
Islam and politics.
Islam and state.
Motazilites.
Harvard subject headings:
Ikhwān al-Ṣafāʼ.
Islam and state.
Motazilites.
Princeton subject headings:
Ikhwān al-Ṣafāʼ.
Islam and state.
Motazilites.