Columbia subject headings:
Islam and politics.
Islam and state.
Leadership--Religious aspects--Islam.
ʻUmar II, Caliph, -720.
Harvard subject headings:
Islam and politics.
Islam and state.
Leadership--Religious aspects--Islam
ʻUmar II, Caliph, -720.
Princeton subject headings:
Islam and politics.
Islam and state.
Leadership--Religious aspects--Islam.
ʻUmar II, Caliph, -720.