No. 78-1756. Submitted April 17, 1979. Decided May 21, 1979. Gary A. Eberhardt of Greensfelder, Hemker, Wiese, Gale Chappelow, St. Louis, Mo., for petitioner; Joseph B. Pereles, St. Louis, Mo., on brief. William Wachter of N.L.R.B., Washington, D.C., for respondent; John S. Irving, Gen. Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Robert E. Allen, Acting Associate Gen. Counsel, Elliott Moore, Deputy Associate Gen. Counsel, Washington, D.C., on brief. Appeal from the National Labor Relations