Columbia subject headings:
Dude ranches--Rocky Mountains Region--History.
Dude ranches--West (U.S.)--History.
Harvard subject headings:
Dude ranches--Rocky Mountains Region--History.
Dude ranches--West (U.S.)--History.
Princeton subject headings:
Dude ranches--Rocky Mountains Region--History.
Dude ranches--West (U.S.)--History.