Columbia subject headings:
Aerts, W. J.
Byzantine Empire--Civilization.
Byzantine Empire--Study and teaching.
Harvard subject headings:
Aerts, W. J.
Aerts, W. J.--Bibliography.
Byzantine Empire--Civilization.
Byzantine Empire--Study and teaching.
Princeton subject headings:
Aerts, W. J.
Byzantine Empire--Civilization.
Byzantine Empire--Study and teaching.