Nos. 21781, 21883. Argued October 30, 1968. Decided January 23, 1969. Mr. Lewis F. Grayson, of the bar of the Supreme Court of Oklahoma, pro hac vice, by special leave of court, with whom Messrs. David S. Barr and William B. Peer, Washington, D.C., were on the brief, for petitioner in No. 21,781 and respondent in No. 21,883. Mrs. Clarice Feldman, Atty., National Labor Relations Board, of the bar of the Supreme Court of Wisconsin, pro hac vice, by special leave of court, with whom Messrs. Arnold Ordman