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Schwander, J.; Barnola, J.-M.; Andrié, C.; Leuenberger, M.; Ludin, A.; Raynaud, D.; Stauffer, B. (1993). The age of the air in the firn and the ice at Summit, Greenland. Journal of Geophysical Research: Atmospheres, 98(D2), pp. 2831-2838. American Geophysical Union 10.1029/92JD02383
