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Mark N. Demitroff Department of Geography Permafrost Group University of Delaware Newark, DE 19716–2541 U.S.A. (856) 696–9759 mdemitrf@udel.edu |
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Mark N. Demitroff Department of Geography Permafrost Group University of Delaware Newark, DE 19716–2541 U.S.A. (856) 696–9759 mdemitrf@udel.edu |