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Sturm, P.; Leuenberger, M.; Valentino, F. L.; Lehmann, B.; Ihly, B. (2006). Measurements of CO2, its stable isotopes, O2/N2, and 222Rn at Bern, Switzerland. Atmospheric chemistry and physics, 6(7), pp. 1991-2004. European Geosciences Union 10.5194/acp-6-1991-2006
