Columbia subject headings:
Rural poor--United States--History--Pictorial works.
United States--Rural conditions--Pictorial works.
Harvard subject headings:
Lange, Dorothea.
Rural poor--United States--History--Pictorial works.
United States--Rural conditions--Pictorial works.
Princeton subject headings:
Rural poor--United States--History--Pictorial works.
United States--Rural conditions--Pictorial works.