No. 78-1749. Argued November 27, 1979. Decided December 28, 1979. Edward S. Dorsey, N.L.R.B., Washington, D.C. (Andrew F. Tranovich, John S. Irving, Gen. Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Robert E. Allen, Acting Associate Gen. Counsel, and Elliott Moore, Deputy Associate Gen. Counsel, N. L. R. B., Washington, D.C., on the brief), for petitioner. Sam Sexton, Jr., Fort Smith, Ark., for respondent. Before DOYLE and McKAY, Circuit Judges, and BROWN, District Judge. Of the District of