Columbia subject headings:
Labor laws and legislation--United States.
United States. Labor Management Relations Act, 1947.
United States. Laws, statutes, etc. Labor management relations act, (1947)
United States. National Labor Relations Board.
Harvard subject headings:
United States. Labor Management Relations Act, 1947.
United States. National Labor Relations Board
Princeton subject headings:
United States. Labor management relations act.
United States. National Labor Relations Board