Columbia subject headings:
Depressions--1929--United States.
Depressions--1929.
Economic policy--History--20th century.
International relations--History--20th century.
World War, 1939-1945--Causes.
Harvard subject headings:
Depressions--1929
Depressions--1929--United States
Economic policy--History--20th century.
International relations--History--20th century
World War, 1939-1945--Causes.
Princeton subject headings: