Não informado. (1976). RAILWAY ENGINEER. Mechanical Engineering Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. RAILWAY ENGINEER. London: Mechanical Engineering Publications, 1976.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. RAILWAY ENGINEER. Mechanical Engineering Publications, 1976.
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