Columbia subject headings:
Harvard subject headings:
Historiography--Islamic Empire.
Islamic Empire--History--750-1258
Islamic Empire--Intellectual life
Layth ibn Saʻd, 713-791
Umayyad dynasty
Princeton subject headings:
Historiography--Islamic Empire.
Islamic Empire--History--750-1258.
Islamic Empire--Intellectual life.
Layth ibn Saʻd, 713-791.
Umayyad dynasty.