Columbia subject headings:
Hydraulic structures--Syria--History.
Irrigation canals and flumes--Syria--History.
Municipal water supply--Syria--History.
Water use--Syria--History.
Harvard subject headings:
Hydraulic structures--Syria--History.
Irrigation canals and flumes--Syria--History.
Municipal water supply--Syria--History.
Water use--Syria--History.
Princeton subject headings:
Hydraulic structures--Syria--History.
Irrigation canals and flumes--Syria--History.
Municipal water supply--Syria--History.
Water use--Syria--History.