Columbia subject headings:
Harvard subject headings:
Hydrology--West (U.S.)
Water resources development--West (U.S.)--History
Water-supply--West (U.S.)--History.
West (U.S.)--Economic conditions.
West (U.S.)--History.
Princeton subject headings:
Hydrology--West (U.S.).
Water resources development--West (U.S.)--History.
Water-supply--West (U.S.)--History.
West (U.S.)--Economic conditions.
West (U.S.)--History.