Quatrième Symposium International sur la Théorie et la Pratique dans l'Économie des Transports = Fourth International Symposium on Theory and Practice in Transport Economics = Viertes Internationales Symposium über Theorie und Praxis in der Verkehrswirtschaft compte rendu des débats = proceedings of the debates = Niederschrift der Discussion: La Haye, 5-7 Octobre 1971
International Symposium on Theory and Practice in Transport Economics4th1971The Hague.
Organisation for Economic Co-operation and Development.
European Conference of Ministers of Transport.
Paris Organisation for Economic Co-operation and Development [London] [H.M.S.O.]
1972
Text in English, French and German
Transportation