Columbia subject headings:
Art, American--19th century--Exhibitions.
Art, American--20th century--Exhibitions.
Art, American--Exhibitions.
Railroads in art--Exhibitions.
Harvard subject headings:
Art, American--19th century--Exhibitions
Art, American--20th century--Exhibitions
Art, American--Exhibitions
Art, Modern--19th century--Exhibitions
Art, Modern--20th century--Exhibitions
Landscape painting, American--Exhibitions.
Railroads in art--Exhibitions.
Railroads in art--Pictorial works.
Princeton subject headings:
Art, American--Exhibitions.
Art, Modern--United States--19th century--Exhibitions.
Art, Modern--United States--20th century--Exhibitions.
Landscapes in art.
Railroads in art--Exhibitions.