No. 75-1827. Argued October 22, 1976. Decided December 3, 1976. Elliott Moore, Deputy Associate Gen. Counsel, John D. Burgoyne and John C. Rother, Attys., N.L.R.B., Washington, D.C., for petitioner. Ralph Adam Fine, Milwaukee, Wis., for respondents. Before CLARK, Associate Justice (Retired), FAIRCHILD, Chief Judge, and HASTINGS, Senior Circuit Judge. Associate Justice Tom C. Clark, United States Supreme Court (Ret.), is sitting by designation. PER CURIAM: This enforcement proceeding, filed by the