No. 71-1720. Submitted November 13, 1972. Decided January 26, 1973. Veryl L. Riddle, St. Louis, Mo., for petitioner. Jay E. Shanklin, Atty. N.L.R.B., Washington, D.C., for respondent. Petition for review from the National Labor Relations Board. Before MATTHES, Chief Judge, MEHAFFY, Circuit Judge, and VAN PELT, Senior District Judge. District of Nebraska, sitting by designation. MATTHES, Chief Judge. This case presents the petition of McDonnell Douglas Corp. to review and set aside the order of the