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Stauffer, B.; Lochbronner, E.; Oeschger, H.; Schwander, J.; Neftel, A. (1994). Historical CH4 record from ice cores at Byrd Station and Dye 3. In: Boden, Thomas A.; Kaiser, Dale P.; Sepanski, Robert J.; Stoss, Frederick W. (eds.) Trends '93: A Compendium of Data on Global Change. ESD Publication: Vol. 4195 (pp. 234-238). Carbon Dioxide Information Analysis Center
Stauffer, B.; Lochbronner, E.; Oeschger, H.; Schwander, J. (1988). Methane concentration in the glacial atmosphere was only half that of the preindustrial Holocene. Nature, 332(6167), pp. 812-814. Macmillan Journals Ltd. 10.1038/332812a0
