Columbia subject headings:
Eritrea--Antiquities--Congresses.
Excavations (Archaeology)--Congresses.
Excavations (Archaeology)--Sudan--Congresses.
Sudan--Antiquities--Congresses.
Harvard subject headings:
Eritrea--Antiquities--Congresses.
Excavations (Archaeology)--Eritrea--Congresses.
Excavations (Archaeology)--Sudan--Congresses.
Sudan--Antiquities--Congresses.
Princeton subject headings:
Eritrea--Antiquities--Congresses.
Excavations (Archaeology)--Congresses.
Excavations (Archaeology)--Sudan--Congresses.
Sudan--Antiquities--Congresses.