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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Council of Applied Economic Research, New Delhi. Techno-Economic Survey of Darjeeling Tea Industry. the author, 1977.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNational Council of Applied Economic Research, New Delhi. Techno-Economic Survey of Darjeeling Tea Industry. the author, 1977.
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