13-CD-26, 27
AFL-Sheet Metal Workers, Local 1 and John Stahn and AFL-Plumbers, Pipes Trades Council 24 and Local 35 (Refrigeration & Air Conditioning Contractors of Penn & Mayer Furnace Co.)
AFL-Sheet Metal Workers, Local 1 and John Stahn and AFL-Plumbers, Pipes Trades Council 24 and Local 35 (Refrigeration & Air Conditioning Contractors of Penn & Mayer Furnace Co.)