No. 20199. March 24, 1971. Rehearing Denied April 26, 1971. Keith E. Mattern, St. Louis, Mo., Ronald L. Aylward, John F. Gillespie, St. Louis, Mo., for petitioner. Marvin Roth, Atty., N.L.R.B., Washington, D.C., Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, Elliott Moore, Atty., N.L.R.B., for respondent. Robert Karmel, Chicago, Ill., for intervenor. Before GIBSON and BRIGHT, Circuit Judges, and McMANUS, Chief District Judge. PER