Ray, I. (1998). Road planning for economic development: A case study of North Bengal. Classical.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRay, Indrajit. Road Planning for Economic Development: A Case Study of North Bengal. Classical, 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRay, Indrajit. Road Planning for Economic Development: A Case Study of North Bengal. Classical, 1998.
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