Columbia subject headings:
Harvard subject headings:
Black Sea Region--Antiquities--Congresses.
Middle East--Antiquities--Congresses.
Mounds--Black Sea Region--Congresses.
Mounds--Middle East--Congresses.
Princeton subject headings:
Black Sea Region--Antiquities--Congresses.
Middle East--Antiquities--Congresses.
Mounds--Black Sea Region--Congresses.
Mounds--Middle East--Congresses.