No. 79-1152. Argued May 7, 1980. Decided September 8, 1980. James Callear, Washington, D.C. (William F. Wachter of N. L. R. B., Washington, D.C., with him on the brief), for petitioner. Peter T. Van Dyke, Lytle Soule Emery, Oklahoma City, Okl., for respondent. Petition from the National Labor Relations Board. Before BARRETT and SEYMOUR, Circuit Judges, and PECK, Senior Circuit Judge. Of the United States Court of Appeals, Sixth Circuit, sitting by designation. JOHN W. PECK, Senior Circuit Judge.