Columbia subject headings:
United States--Defenses.
United States--Economic conditions--1918-1945.
World War, 1939-1945--Economic aspects--United States.
Harvard subject headings:
United States--Defenses.
United States--Economic conditions--1918-1945.
World War, 1939-1945--Economic aspects--United States.
Princeton subject headings:
United States--Defenses.
United States--Economic conditions--1918-1945.
World War, 1939-1945--Economic aspects--United States.