Nos. 71-1137, 71-1255. Argued January 24, 1972. Decided February 14, 1972. Mr. Ira M. Lechner, Washington, D.C., with whom Mr. W. Dean Wagner, Arlington, Va., was on the brief, for petitioner in No. 71-1137. Mr. Warren M. Davison, Deputy Asst. General Counsel, with whom Messrs. Dominick L. Manoli, Associate General Counsel, and Marcel Mallet-Prevost, Assistant General Counsel, National Labor Relations Board, were on the brief, for petitioner in No. 71-1255 and respondent in No. 71-1137. Mr. Richard