Não informado. (1961). International Railway Journal. Simmons Boardman Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. International Railway Journal. New York: Simmons Boardman Publishing, 1961.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. International Railway Journal. Simmons Boardman Publishing, 1961.
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