Columbia subject headings:
Landscape photography--Exhibitions.
Photography--History--19th century--Exhibitions.
Photography--United States--History--Exhibitions.
Photography--West (U.S.)--History--Exhibitions.
Harvard subject headings:
Landscape photography--Pictorial works.
Landscape photography.
Photography--United States.
United States--Pictorial works.
Princeton subject headings:
Landscape photography.
United States--Description and travel.
United States--Pictorial works.
West (U.S.)--Description and travel.
West (U.S.)--Pictorial works.