Columbia subject headings:
Bronze age--Europe--Congresses.
Bronze age--Middle East--Congresses.
Copper age--Europe--Congresses.
Copper age--Middle East--Congresses.
Water and civilization--Congresses.
Harvard subject headings:
Bronze Age--Europe--Congresses.
Bronze Age--Middle East--Congresses.
Copper Age--Europe--Congresses.
Copper Age--Middle East--Congresses.
Europe--Antiquities--Congresses.
Irrigation engineering, Prehistoric--Europe--Congresses.
Irrigation engineering, Prehistoric--Middle East--Congresses.
Middle East--Antiquities--Congresses.
Water and civilization--Congresses.
Princeton subject headings:
Bronze age--Europe--Congresses.
Bronze age--Middle East--Congresses.
Copper age--Europe--Congresses.
Copper age--Middle East--Congresses.
Water and civilization--Congresses.