Railway mechanical engineering - Philadelphia, PA : Simmons-Boardman Pub. Corp., 1916-1949 - v. ISSN: 0097-6695 = Railway mechanical engineering = Railw. mech. Eng. Subjects--Topical Terms: TRENESTECNOLOGIA FERROVIARIAELECTRICIDADFERROCARRILESINGENIERIA ELECTRICA Universal Decimal Class. No.: 625.1