Columbia subject headings:
Ikhwān al-Ṣafāʼ.
Islam and state.
Political science--Islamic Empire--History.
Harvard subject headings:
Ikhwān al-Ṣafāʼ
Islam and state.
Political science--Islamic Empire--History
Princeton subject headings:
Ikhwān al-Ṣafāʼ.
Islam and state.
Political science--Islamic Empire--History.