Tappert, H. (1969). 38th International Congress London 1969: Standardisation of motorbuses. Brussels: International Union of Public Transport.
Παραπομπή Chicago StyleTappert, H. 38th International Congress London 1969: Standardisation of Motorbuses. Brussels: International Union of Public Transport, 1969.
Παραπομπή MLATappert, H. 38th International Congress London 1969: Standardisation of Motorbuses. Brussels: International Union of Public Transport, 1969.
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