No. 76-1089. Argued September 15, 1976. Decided June 29, 1977. Andrew F. Tranovich, Atty., N.L.R.B., Washington, D.C. (John S. Irving, Jr., Gen. Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Carl L. Taylor, Associate Gen. Counsel, Elliott Moore, Deputy Associate Gen. Counsel, Paul J. Spielberg, Atty., N.L.R.B., Washington, D.C., on brief), for petitioner. Robert M. Baptiste, Washington, D.C. (Gary S. Witlen, and Angelo V. Arcadipane, Washington, D.C., on brief), for intervenor. John O. Pollard