//-->
Zur Problematik Schiene-Strasse in Westdeutschland
Ehrhardt, Johann, (1959)
Soviet transport experience : its lessons for other countries
Hunter, Holland, (1968)
The Impact of computer techniques on road transport planning : A preliminary survey of the economic potential of various techniques for the organisation of road transport operations
Norman, W. E., (1969)
Transport for passengers : a study in enterprise without license
Hibbs, John, (1971)
Transport studies : an introduction
Hibbs, John, (1970)
The Bus and Coach Industry : its economics and organization
Hibbs, John, (1975)