No. 71-1658. Submitted June 12, 1972. Decided July 12, 1972. David Miller, Atty., Peter G. Nash, Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, Thomas E. Silfen, Atty., N. L. R. B., for petitioner. Hugh M. Smith, Allen P. Schoolfield, Jr., Schoolfield Smith, Dallas, Tex., for respondent. Appeal from the National Labor Relations Board. Before ROSS and STEPHENSON, Circuit Judges, and DAVIES, Senior District Judge. Sitting by special designation. STEPHENSON, Circuit Judge. Piggly Wiggly (respondent)