No. 77-2425. Argued March 6, 1978. Decided May 10, 1978. Warren M. Davison, Washington, D.C. (Earle K. Shawe, Shawe Rosenthal, Baltimore, Md., on brief), for petitioner. Elinor Hadley Stillman, Washington, D.C. (Collis Suzanne Stocking, Attys., N.L. R.B., John S. Irving, Gen. Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Carl L. Taylor, Associate Gen. Counsel, Elliott Moore, Deputy Associate Gen. Counsel, N.L. R.B., Washington, D.C., on brief), for respondent. Jerry D. Anker, Washington, D