Não informado. (1970). Rail International. International Railway Congress Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Rail International. Brussels: International Railway Congress Association, 1970.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Rail International. International Railway Congress Association, 1970.
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