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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRangwala. Railway, Bridges and Tunnels Engineering. 02nd. New Delhi: Charotar Publisher, 2016.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRangwala. Railway, Bridges and Tunnels Engineering. 02nd. Charotar Publisher, 2016.
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