Salmon & Cowin, Inc., Mining Engineers & Contractors. No. 11138, in circuit court of appeals for 5th circuit, Salmon and Cowin, Inc., Mining Engineers & Contractors v. National Labor Relations Board; National Labor Relations Board v. Salmon and Cowin, Inc., Mining Engineers & Contractors and Mine & Contractors Supply Company, Inc., on petition to review and set aside and on request for enforcement of order of National Labor Relations Board; brief for National Labor Relations Board.