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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIndian institute of, Ecology and environment. International Encyclopaedia of Ecology and Environment Vol 24. New delhi: IIEE, 1995.
एमएलए (9वां संस्करण) प्रशस्ति पत्रIndian institute of, Ecology and environment. International Encyclopaedia of Ecology and Environment Vol 24. IIEE, 1995.
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