No. 1160, Docket 80-4009. Argued May 13, 1980. Decided June 5, 1980. Irving T. Bush, New York City (Miller Bush, New York City, of counsel), for respondent Amboy Baking, Inc. Christopher W. Katzenback, Atty., N.L.R.B., Washington, D. C. (William A. Lubbers, General Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Robert E. Allen, Acting Associate Gen. Counsel, and Elliott Moore, Deputy Associate Gen. Counsel, Washington, D.C., of counsel), for petitioner. Before LUMBARD, MANSFIELD and MULLIGAN