No. 17843. Argued June 11, 1971. Decided September 9, 1971. Corinna Metcalf, Marcel Mallet-Prevost, Asst. Gen. Counsel, N.L.R.B., Washington, D.C. (Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, William F. Wachter, Jack H. Weiner, Attys., N.L.R.B., Washington, D.C., on the brief), for petitioner. George V. Gardner, Asa Ambrister, Gardner Ambrister, Washington, D.C., for respondent. Before STALEY and ADAMS, Circuit Judges, and GARTH, District Judge. OPINION OF THE COURT GARTH