European networks, 19th-20th centuries. New approaches to the formation of a transnational transport and communications system = Réseaux européens, XIXe-XXe siécles. Nouvelles approches sur la formation d'un système transnational de transports... - Merger, Michèle; Carreras, Albert; Giuntini, Andrea; International Economic History Congress (Università Bocconi, 1994)