Columbia subject headings:
Aqueducts--Arabia, Roman.
Jordan--Antiquities, Roman.
Syria--Antiquities, Roman.
Harvard subject headings:
Aqueducts--Jordan--History.
Aqueducts--Syria--History.
Jordan--Antiquities, Roman.
Romans--Jordan.
Romans--Syria
Syria--Antiquities, Roman.
Water-supply engineering--Jordan--History.
Water-supply engineering--Syria--History.
Princeton subject headings:
Aqueducts--Arabia, Roman.
Jordan--Antiquities, Roman.
Syria--Antiquities, Roman.