http://pec.lib.wvu.edu/record/P41351928Proceedings of the eighth regular and second annual meeting held at the William Penn Hotel, Pittsburgh, Pa., Thursday, December 13, 1928. Monograph. "Allegheny Regional Board in co-operation with and advisory to the Car Service Division, American Railway Association." <br />Allegheny Regional Advisory Board.Railroads--Ohio River Valley--Congresses.14256