No. 72-1996. Argued December 6, 1973. Decided March 29, 1974. George Kaufmann. Washington D.C., with whom Laurence J. Cohen, Washington, D.C., was on the brief, for petitioner. Patrick Hardin. Associate Gen. Counsel. N.L.R.B., with whom John S. Irving, Deputy Gen. Counsel, Elliott Moore, Acting Asst. Gen. Counsel, and Joseph E. Mayer, Atty., N.L.R.B., were on the brief, for respondent. Petition for review from the National Labor Relations Board. Before McGOWAN, TAMM and MacKINNON, Circuit Judges