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Stauffer, B.; Neftel, A.; Oeschger, H.; Schwander, J. (1985). CO2 concentration in air extracted from Greenland ice samples. In: Langway Jr.,, C.C.; Oeschger, H.; Dansgaard, W. (eds.) Greenland Ice Core: Geophysics, Geochemistry and the Environment. Geophysical Monograph Series: Vol. 33 (pp. 85-89). American Geophysical Union 10.1029/GM033p0085
