Pennsylvania. Public Service CommissionInsets: Pittsburgh and vicinity. Scale 1:190 080 ; Philadelphia and vicinity. Scale 1:190 080.; Includes color-keyed index to steam railroads and indexes for steam and industrial railroads shown in black on map.88 x 142 CentimetersJPEGUMN_ALMA:9920620950001701engThe Commission (Harrisburg, Pa)PublicSteam railroad map of PennsylvaniaMapsPennsylvaniaUniversity of Minnesota