Columbia subject headings:
Byzantine Empire--History--Congresses.
Byzantine Empire--Relations--Islamic Empire--Congresses.
Faraj, Wisām ʻAbd al-ʻAzīz.
Islamic Empire--History--Congresses.
Islamic Empire--Relations--Byzantine Empire--Congresses.
Harvard subject headings:
Byzantine Empire--History--Congresses.
Byzantine Empire--Relations--Islamic Empire--Congresses.
Faraj, Wisām ʻAbd al-ʻAzīz.
Islamic Empire--History--Congresses.
Islamic Empire--Relations--Byzantine Empire--Congresses.
Princeton subject headings:
Byzantine Empire--History--Congresses.
Byzantine Empire--Relations--Islamic Empire--Congresses.
Faraj, Wisām ʻAbd al-ʻAzīz.
Islamic Empire--History--Congresses.
Islamic Empire--Relations--Byzantine Empire--Congresses.