No. 77-1149. Submitted November 14, 1977. Decided February 13, 1978. D. J. Sullivan of Lewis, Rice, Tucker, Allen Chubb, St. Louis, Mo., for petitioner; Michael J. Tannler and Timothy L. Stalnaker, St. Louis, Mo., on the brief. Joseph A. Oertel, Atty., N.L.R.B., Washington, D.C., for respondent; William R. Stewart, Atty., John S. Irving, Gen. Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Carl L. Taylor, Associate Gen. Counsel and Elliott Moore, Deputy Associate Gen. Counsel, N.L.R.B., Washington