Columbia subject headings:
Excavations (Archaeology)--Syria--Tadmur.
Tadmur (Syria)--Antiquities.
Harvard subject headings:
Excavations (Archaeology)--Syria--Tadmur--Congresses.
Middle East--Commerce--Syria--Tadmur--History--To 1500--Congresses.
Rome--Commerce--Syria--Tadmur--Congresses.
Syria--Foreign relations--Congresses.
Syria--Politics and government--2000---Congresses.
Tadmur (Syria)--Antiquities--Congresses.
Tadmur (Syria)--Commerce--Middle East--History--To 1500--Congresses.
Tadmur (Syria)--Commerce--Rome--Congresses.
Princeton subject headings:
Excavations (Archaeology)--Syria--Tadmur.
Tadmur (Syria)--Antiquities.