Columbia subject headings:
Crusades.
Islamic Empire--History--750-1258.
Saladin, Sultan of Egypt and Syria, 1137-1193.
Harvard subject headings:
Crusades
Islamic Empire--History--750-1258.
Saladin, Sultan of Egypt and Syria, 1137-1193
Princeton subject headings:
Crusades.
Islamic Empire--History--750-1258.
Saladin, Sultan of Egypt and Syria, 1137-1193.