Columbia subject headings:
Harvard subject headings:
Archaeology--Syria--Tadmur.
Architecture, Ancient--Syria--Tadmur.
Historic sites--Syria--Tadmur.
Tadmur (Syria)--Antiquities.
Tadmur (Syria)--History--To 1500.
Princeton subject headings:
Archaeology--Syria--Tadmur.
Architecture, Ancient--Syria--Tadmur.
Historic sites--Syria--Tadmur.
Palmyra--Antiquities.
Palmyra--History.
Tadmur (Syria)--Antiquities.
Tadmur (Syria)--History--To 1500.