Columbia subject headings:
Land use--Environmental aspects--West (U.S.)--History.
Land use--West (U.S.)--History.
Harvard subject headings:
Land use--Environmental aspects--West (U.S.)--History.
Land use--West (U.S.)--History.
Princeton subject headings:
Land use--Environmental aspects--West (U.S.)--History.
Land use--West (U.S.)--History.