Columbia subject headings:
Duwwārah Cave (Syria)
Paleogeography--Syria--Palmyra Basin.
Palmyra Basin (Syria)--Antiquities.
Syria--Antiquities.
Harvard subject headings:
Paleogeography--Syria.
Paleolithic period--Syria.
Princeton subject headings:
Duwwarah Cave (Syria)
Paleogeography--Syria--Palmyra Basin.
Palmyra Basin (Syria)--Antiquities.
Syria--Antiquities.
Tadmur (Syria)--Antiquities.