Columbia subject headings:
Excavations (Archaeology)--Oman--Congresses.
Oman--Antiquities--Congresses.
Oman--History--Congresses.
Harvard subject headings:
Excavations (Archaeology)--Oman--Congresses.
Oman--Antiquities--Congresses.
Oman--History--Congresses.
Princeton subject headings:
Oman--Antiquities.
Oman--History.