No. 21369. Argued March 14, 1968. Decided June 28, 1968. Mr. Warren M. Davison, Atty., N.L.R.B., with whom Messrs. Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, and Mrs. Abigail Cooley Baskir, Atty., N.L.R.B., were on the brief, for petitioner. Mr. J.W. Alexander, Jr., Charlotte, N.C., for respondent. Mr. Jacob Sheinkman, New York City, entered an appearance for intervenor, and moved the admission of Mr. Robert T. Snyder, New York