Columbia subject headings:
Harvard subject headings:
Environmental protection--West (U.S.)
Water resources development--West (U.S.)
West (U.S.)--Population--Economic aspects.
Princeton subject headings:
Environmental protection--West (U.S.)
Social surveys--West (U.S.).
Social values--West (U.S.).
Water resources development--West (U.S.)
West (U.S.)--Population.