Columbia subject headings:
Harvard subject headings:
Byzantine Empire--History, Naval.
Crete (Greece)--History--67 B.C.-826 A.D.
Islamic Empire--History, Naval.
Princeton subject headings:
Arabs--Greece--Crete--History.
Byzantine Empire--History--527-1081.
Crete (Greece)--History--67 B.C.-826 A.D.
Islamic Empire--History--750-1258.