Gutknecht, R. (1973). Alternative approaches to public transport fares with their traffic and revenue implications. Brussels: International Union of Public Transport.
Παραπομπή Chicago StyleGutknecht, R. Alternative Approaches to Public Transport Fares With Their Traffic and Revenue Implications. Brussels: International Union of Public Transport, 1973.
Παραπομπή MLAGutknecht, R. Alternative Approaches to Public Transport Fares With Their Traffic and Revenue Implications. Brussels: International Union of Public Transport, 1973.
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