Columbia subject headings:
Industries--United States.
United States--Commerce.
United States--Economic conditions--1918-1945.
United States--Economic policy.
Harvard subject headings:
Industries--United States
United States--Commerce.
United States--Economic conditions--1918-1945.
United States--Economic policy.
Princeton subject headings:
Industries--United States.
United States--Commerce.
United States--Economic conditions--1918-1945.
United States--Economic policy.