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Chappellaz, J.; Blunier, T.; Ankin, M.; Barnola, J. M.; Schwander, J.; Raynaud, D.; Stauffer, B. (1993). The GRIP records of atmospheric CH4 and CO2 and their link with Greenland climate. Eos, Transactions American Geophysical Union, 74(43) American Geophysical Union
