Columbia subject headings:
United States--Civilization.
United States--Description and travel.
United States--In art.
Harvard subject headings:
Land use--United States
Landscapes in art
Landscapes--United States
United States--Civilization--20th century.
United States--Civilization.
United States--Description and travel.
Princeton subject headings:
United States--Civilization.
United States--Description and travel.
United States--In art.