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envfor.nic.in
"Wetland Inventory"(PDF). Sacred Khechopalri Lake. Envis: National Informatics Centre. p. 369. Archived from the original(PDF) on 3 March 2016. Retrieved 2010-05-07.
scstsenvis.nic.in
"Our View". Brief Overview of Valuation of Ecotourlsm in the S1kkim Himalaya. Environment Centre on Ecotourism in Sikkim: national Informatics Centre. Archived from the original on 2010-07-28. Retrieved 2010-05-05.
"Wetland Inventory"(PDF). Sacred Khechopalri Lake. Envis: National Informatics Centre. p. 369. Archived from the original(PDF) on 3 March 2016. Retrieved 2010-05-07.
"Our View". Brief Overview of Valuation of Ecotourlsm in the S1kkim Himalaya. Environment Centre on Ecotourism in Sikkim: national Informatics Centre. Archived from the original on 2010-07-28. Retrieved 2010-05-05.