No. 78-1173. Argued October 4, 1978. Decided December 20, 1978. Alan Banov, Atty., Washington, D.C., with whom John S. Irving, Gen. Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Robert E. Allen, Acting Associate Gen. Counsel, Elliott Moore, Deputy Associate Gen. Counsel, and Peter M. Bernstein, Atty., Washington, D.C., were on brief, for petitioner. Lawrence M. Siskind, Brockton, Mass., with whom Ann-Louise Levine, Brockton, Mass., was on brief, for respondent. Petition from National Labor