Columbia subject headings:
Harvard subject headings:
Arid regions--West (U.S.)--Civilization--History.
Water and civilization.
Water use--West (U.S.)
Water-supply--West (U.S.)
West (U.S.)--Description and travel.
Princeton subject headings:
Arid regions--West (U.S.)--History.
Photography--West (U.S.)--Landscapes.
Water resources development--West (U.S.)--History.
Water-supply--West (U.S.).