No. 77-1775. January 22, 1979. Rehearing Denied May 3, 1979. Richard Brooks (argued), Washington, D.C., for petitioner. Michael B. Roger (argued) of Van Bourg, Allen, Weinberg Roger, San Francisco, Cal., for Butchers Union Local 193. Morgan, Lewis Bockius, Washington, D.C., for respondent. Before MERRILL and KENNEDY, Circuit Judges, and BARTELS, District Judge. Honorable John R. Bartels, United States District Judge for the Eastern District of New York, sitting by designation. KENNEDY, Circuit Judge: