Columbia subject headings:
Water resources development--West (U.S.)
Water reuse--West (U.S.)
Water-supply--West (U.S.)
Harvard subject headings:
Water resources development--West (U.S.)
Water reuse--West (U.S.)
Water-supply--West (U.S.)
Princeton subject headings:
Water resources development--West (U.S.)
Water reuse--West (U.S.).
Water-supply--West (U.S.).