Columbia subject headings:
Civilization, Ancient.
Civilization, Medieval.
Eurasia--History.
Islamic civilization.
Monotheism--History--To 1500.
Religion and civilization--History--To 1500.
Harvard subject headings:
Civilization, Ancient
Civilization, Medieval
Eurasia--History.
Islamic civilization
Monotheism--History--To 1500.
Religion and civilization--History--To 1500.
Princeton subject headings:
Islam--History--To 1500.