No. 87-2099. Submitted April 13, 1988. Decided June 27, 1988. Rehearing and Rehearing En Banc Denied August 16, 1988. Gerladn P. Patten, Little Rock, Ark., for petitioner. William R. Stewart, Washington, D.C., for respondent. Petition for review from the National Labor Relations Board. Before BOWMAN, Circuit Judge, FLOYD R. GIBSON, Senior Circuit Judge, and HANSON, Senior District Judge. The HONORABLE WILLIAM C. HANSON, United States Senior District Judge for the Southern District of Iowa, sitting