Columbia subject headings:
Erech (Extinct city)
Excavations (Archaeology)--Syria.
Syria--Antiquities.
Syria--Civilization.
Syria--History--333 B.C.-634 A.D.
Tadmur (Syria)--Antiquities.
Tadmur (Syria)--History.
Harvard subject headings:
Erech (Extinct city)
Excavations (Archaeology)--Syria
Syria--Antiquities.
Syria--Civilization.
Syria--History--333 B.C.-634 A.D.
Tadmur (Syria)--Antiquities.
Tadmur (Syria)--History.
Princeton subject headings: