Columbia subject headings:
Tadmur (Syria)--Antiquities.
Tadmur (Syria)--Civilization.
Tadmur (Syria)--History.
Harvard subject headings:
Tadmur (Syria)--Antiquities.
Tadmur (Syria)--Civilization.
Tadmur (Syria)--History.
Princeton subject headings:
Tadmur (Syria)--Antiquities.
Tadmur (Syria)--Civilization.
Tadmur (Syria)--History.