Nos. 7503, 7538. Argued February 17, 1941. Decided May 12, 1941. On Petition to Review and Set Aside an Order of the National Labor Relations Board. Petition by the Bethlehem Steel Company and another to review and set aside an order of the National Labor Relations Board, wherein the Plan of Employees' Representation at the Steelton, Pa., Plant of the Bethlehem Steel Company and another intervened in support of the petition and the Steel Workers Organizing Committee intervened in support of the order