No. 77-1861. Submitted April 11, 1978. Decided June 13, 1978. John G. Elligers and Michael F. Messitte, Attys., John S. Irving, Gen. Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Carl L. Taylor, Assoc. Gen. Counsel and Elliott Moore, Deputy Assoc. Gen. Counsel, NLRB, Washington, D.C., filed briefs for petitioner. Gerald Tockman and Charles W. Ahner, Jr., St. Louis, Mo., filed brief for respondents. Petition for enforcement of its order of National Labor Relations Board. Before GIBSON, Chief