Columbia subject headings:
Landscape photography--United States.
Photographers--United States--Biography.
Watkins, Carleton E., 1829-1916--Archives--Catalogs.
Watkins, Carleton E., 1829-1916.
Harvard subject headings:
Landscape photography--United States.
Photographers--United States--Biography
Watkins, Carleton E., 1829-1916
Watkins, Carleton E., 1829-1916--Archives.
Princeton subject headings: