Columbia subject headings:
Energy conservation--United States.
Energy industries--United States.
Energy policy--United States.
Natural resources--United States.
Natural resources.
Power (Mechanics)
Power resources--United States.
United States--Economic conditions--1918-1945.
United States--Economic policy--1933-1945.
United States--Economic policy.
Harvard subject headings:
Princeton subject headings:
Energy conservation--United States.
Energy industries--United States.
Energy policy--United States.
Natural resources--United States.
Power (Mechanics)
Power resources--United States.
United States--Economic conditions--1918-1945.
United States--Economic policy--1933-1945.