Columbia subject headings:
Agriculture, Prehistoric--Diyala River Region (Iran and Iraq)--History.
Agriculture, Prehistoric--Iraq--History.
Diyala Basin Archaeological Project.
Diyala River Region (Iran and Iraq)--Antiquities.
Iraq--Antiquities.
Irrigation farming--Diyala River Region (Iran and Iraq)--History.
Irrigation farming--Iraq--History.
Irrigation--Diyala River Region (Iran and Iraq)--History.
Irrigation--Iraq--History.
Soils, Salts in--Diyala River Region (Iran and Iraq)--History.
Soils, Salts in--Iraq--History.
Harvard subject headings:
Agriculture--Iraq--History.
Diyala Basin Archaeological Project.
Diyala River Basin (Iraq)--Antiquities.
Excavations (Archaeology)--Diyala River Watershed (Iran and Iraq)
Iraq--Antiquities.
Saline irrigation--Iraq--History.
Princeton subject headings: