Columbia subject headings:
Human settlements--Tigris River Watershed--History.
Tigris River Watershed--Antiquities.
Harvard subject headings:
Excavations (Archaeology)--Tigris River Valley.
Human settlements--Tigris River Valley.
Iraq--Civilization--To 634.
Tigris River Valley--Antiquities.
Princeton subject headings:
Excavations (Archaeology)--Tigris River Valley.
Human settlements--Tigris River Valley.
Iraq--Civilization--To 634.
Tigris River Valley--Antiquities.