No. 76-1633. Argued September 29, 1977. Decided March 6, 1978. Jerry D. Anker, Washington, D.C., with whom Burton M. Epstein, New York City, and Robert E. Nagle, Washington, D.C., were on the brief, for petitioner. Aileen Armstrong, Atty., N.L.R.B., Washington, D.C., with whom John S. Irving, Gen. Counsel, Carl L. Taylor, Associate Gen. Counsel, and Elliott Moore, Deputy Associate Gen. Counsel, Washington, D.C., were on the brief, for respondent. Roger H. Briton, New York City, of the bar of the