Nos. 78-1322, 78-1902. Argued September 13, 1979. Decided October 12, 1979. James E. Hartley, Denver, Colo. (Warren L. Tomlinson and Holland Hart, Denver, Colo., of counsel, on brief), for petitioner. Janet C. McCaa, N.L.R.B., Washington, D.C. (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 brief), for respondent. Petition for review of an order