Columbia subject headings:
Depressions--1929--United States.
United States--Economic conditions--1918-1945.
Harvard subject headings:
Depressions--1929--United States
Depressions--1933--United States.
United States--Economic conditions--1918-1945.
Princeton subject headings:
Depressions--1933--United States.
United States--Economic conditions--1918-1945.