Columbia subject headings:
Harvard subject headings:
Africa, Northeast--Antiquities--Congresses.
Architecture, Ancient--Africa, Northeast--Congresses.
Architecture, Mameluke--Egypt--Congresses.
Excavations (Archaeology)--Africa, Northeast--Congresses.
Fortification, Prehistoric--Africa, Northeast--Congresses.
Fortification--Egypt--History--Congresses.
Fortification--Nubia--History--Congresses.
Princeton subject headings:
Architecture, Mameluke--Egypt--Congresses.
Fortification--Egypt--History--Congresses.
Fortification--Nubia--History--Congresses.