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Jean-Paul Rodrigue (2020), "Chapter 3 – Transportation, Economy and Society > Transportation and Society > Passengers Mobility Transition", The Geography of Transport Systems (بالألمانية) (5 ed.), New York: Routledge, (456 pages), ISBN:978-0-367-36463-2, Archived from the original on 2022-05-06, Retrieved 2020-09-20قالب:Digitalisat.