Columbia subject headings:
Harvard subject headings:
Hotels--Alps Region--History--19th century.
Hotels--Alps Region--History--20th century.
Tourism--Alps Region--History--19th century.
Tourism--Alps Region--History--20th century.
Princeton subject headings:
Hotels--Alps Region--History--19th century.
Hotels--Alps Region--History--20th century.
Tourism--Alps Region--History--19th century.
Tourism--Alps Region--History--20th century.