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Nature Communications|June 14, 2012
Pattern of extinction of the woolly mammoth in BeringiaG M MacDonald, D W Beilman, Y V Kuzmin, et al.Science (New York, N.Y.)|January 17, 2004
Siberian peatlands a net carbon sink and global methane source since the early HoloceneL C Smith, G M MacDonald, A A Velichko, et al.Pageof 3