No. 768, Docket 77-4202. Argued March 30, 1978. Decided April 17, 1978. Jesse I. Etelson, Washington, D.C. (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, John G. Elligers, Atty., Washington, D.C., of counsel), for petitioner. Stephen Lichatin III, Warwick, R. I. (Breslin, Sweeney Gordon, David F. Sweeney, Warwick, R. I., of counsel), for respondent. Before FEINBERG, MANSFIELD