No. 76-1305. Argued and Submitted December 1, 1977. Decided December 28, 1977. Wells T. Lovett, Lovett, Wible Lamar, Mark R. Hutchinson, Owensboro, Ky., Thorley C. Mills, Jr., Asst. Counsel, The Firestone Tire Rubber Co., Walter B. Connolly, Jr., Akron, Ohio, for petitioner. Elliott Moore, Deputy Associate Gen. Counsel, N.L.R.B., Washington, D.C., for respondent. Herbert L. Segal, Irwin H. Cutler, Jr., Segal, Isenberg, Sales, Stewart Nutt, Louisville, Ky., for intervenor. Petition for review from