No. 3812, court of appeals, 10th circuit. Cyrus A. Sinter, acting regional director for 17th region of National Labor Relations Board, for and on behalf of National Labor Relations Board, v. Denver Building and Construction Trades Council. International Brotherhood of Electrical Workers, A. F. L., Local 6S, and United Association of Journeymen Pipe Fittors, and Apprentices of Plumbing and Pipe Kitting Industry of United States nnd Canada, A. F. L., Local 3, on appeal from order of district court for district of Colorado; brief for appellant.

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