Columbia subject headings:
Depressions--1929--United States.
Documentary photography--United States--History.
United States--Social conditions--1933-1945.
Harvard subject headings:
Depressions--1929--United States
Documentary photography--United States--History.
United States--Social conditions--1933-1945.
Princeton subject headings:
Depressions--1929--United States.
Documentary photography--United States--History.
United States--Social conditions--1933-1945.