Columbia subject headings:
Industrial relations--United States.
Labor laws and legislation--United States.
United States. Labor Management Relations Act, 1947.
Harvard subject headings:
Industrial relations--United States
Labor laws and legislation--United States
United States. Labor Management Relations Act, 1947.
Princeton subject headings:
Industrial relations--United States.
Labor laws and legislation--United States.
United States. Labor Management Relations Act, 1947