Nos. 73-1362, 73-1420. Submitted January 14, 1974. Decided May 1, 1974. As Modified on Denial of Rehearing and Rehearing En Banc June 6, 1974. George S. Leonard, Washington, D.C., for petitioners. Judith Wilkenfeld, Atty., National Labor Relations Board, Washington, D.C., for respondent. Russell Woody, Chicago, Ill., for intervenors. Appeal from the National Labor Relations Board. Before Van OOSTERHOUT, Senior Circuit Judge, and LAY and STEPHENSON, Circuit Judges. STEPHENSON, Circuit Judge. These