Columbia subject headings:
Labor contract--United States.
United States--Politics and government.
United States. Constitution.
United States. National Industrial Recovery Act of 1933.
Harvard subject headings:
Constitutional law--United States
Constitutions--United States
Labor contract--United States.
United States--Politics and government.
United States. National Industrial Recovery Act (1933)
Princeton subject headings:
Labor contract--United States.
New Deal, 1933-1939.
United States--Economic policy--1933-1945.
United States--Politics and government--1933-1945.
United States. Constitution