Walworth Company. In matter of Walworth Company and Pattern Makers' Association of Pittsburgh and Vicinity, Pattern Makers' League of N. A., affiliated with A. F. of L.; in matter of [same] and Steel Workers' Organizing Committee on behalf of A. A. I. S. T. of N. A., cases nos. R-647 and R-648; supplemental decision, order, and certification of representatives, Sept. 1, 1939.