Columbia subject headings:
Mines and mineral resources--West (U.S.)--History--19th century.
Ranch life--West (U.S.)--History--19th century.
West (U.S.)--History--1848-1860.
Harvard subject headings:
Mines and mineral resources--West (U.S.)--History--19th century.
Ranch life--West (U.S.)--History--19th century.
West (U.S.)--History--1860-1890.
West (U.S.)--History--1890-1945.
Princeton subject headings:
Mines and mineral resources--West (U.S.)--History--19th century.
Ranch life--West (U.S.)--History--19th century.
West (U.S.)--History--19th century.