Nos. 21785, 21832. Argued March 19, 1969. Decided July 18, 1969. Mr. Jerry D. Anker, Washington, D.C., with whom Mr. Morris P. Glushien, New York City, was on the brief, for petitioner in No. 21,785 and intervenor in No. 21,832. Mr. William H. Smith, Jr., Columbia, S. Car., with whom Messrs. E. Riley Casey and Brian J. O'Neill, Washington, D.C., were on the brief, for petitioner in No. 21,832 and intervenor in No. 21,785. Mr. Robert M. Lieber, Atty., National Labor Relations Board, of the bar of