Columbia subject headings:
Documentary photography--United States.
United States--Social conditions--Pictorial works.
United States. Farm Security Administration.
Wolcott, Marion Post, 1910-1990.
Harvard subject headings:
Documentary photography--United States
United States--Social conditions--Pictorial works.
United States. Farm Security Administration.
Wolcott, Marion Post, 1910-1990
Princeton subject headings:
Documentary photography.
Wolcott, Marion Post, 1910-1990.