Search for: [References = %224. Brown J.%2C Ferrians Jr. O.J.%2C Heginbottom J.A.%2C Melnikov E.S.%2C 1998%2C revised February 2001%2C Circum%5C-arctic Map of Permafrost and Ground Ice Conditions%2C Boulder%2C CO%5C: National Snow and Ice Data Center. Digital media. http%5C:%5C%2F%5C%2Fnsidc.org%5C%2Fdata%5C%2Fdocs%5C%2Ffgdc%5C%2Fggd318_map_circumarctic%5C%2F%235. %5C(7.09.2015%5C)%22]

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