No. 22073. Argued October 31, 1969. Decided June 30, 1970. Petition for Rehearing Denied October 1, 1970. Certiorari Granted March 22, 1971. See 91 S.Ct. 1195. Mr. Donald J. Coapuano, Washington, D.C., with whom Mr. Martin F. O'Donoghue, Washington, D.C., was on the brief, for petitioner. Mr. Peter Ames Eveleth, Atty., National Labor Relations Board, of the bar of the Court of Appeals of New York, pro hac vice, by special leave of court, with whom Messrs. Arnold Ordman, General Counsel, Dominick