"Pittsburgh and the P & LE."; "Perlman, Alfred E."; "Pittsburgh and Lake Erie Railroad Company."; "Industries--Pennsylvania--Pittsburgh."; "Perlman, Alfred E."; "1963"; "

Pamphlet. \"Newcomen address … delivered … Pittsburgh, Pennsylvania … on June 6, 1963.\"

"; ""; "P14969"; "pec"; "Industries--Pennsylvania--Pittsburgh.", "Pittsburgh and Lake Erie Railroad Company."; "14256"; .