Columbia subject headings:
Harvard subject headings:
Arid regions--West (U.S.)--Management.
Irrigation--West (U.S.)
Water resources development--West (U.S.)
Water-supply--West (U.S.)
Princeton subject headings:
Arid regions--West (U.S.)--Management.
Irrigation--West (U.S.)
Water resources development--West (U.S.)
Water-supply--West (U.S.).