Columbia subject headings:
Architecture--Syria--Tadmur.
Art--Syria--Tadmur.
Tadmur (Syria)--Antiquities.
Harvard subject headings:
Architecture--Syria--Tadmur.
Art--Syria--Tadmur.
Tadmur (Syria)--Antiquities.
Princeton subject headings:
Architecture--Syria--Tadmur.
Art--Syria--Tadmur.
Tadmur (Syria)--Antiquities.