Nos. 21043, 21338. Argued February 5, 1968. Decided March 19, 1968. Mr. Melvin S. Schwarzwald, Cleveland, Ohio, with whom Messrs. Joseph E. Finley, Cleveland, Ohio, and Michael H. Gottesman, Washington, D.C., were on the brief, for petitioner in No. 21,043 and intervenor in No. 21,338. Mr. Elliot Bredhoff, Washington, D.C., also entered an appearance for petitioner in No. 21,043. Mr. Gary Green, Attorney, National Labor Relations Board, with whom Messrs. Arnold Ordman, General Counsel, Dominick L