Xu, B. Q.Yao, T. D.Tian, L. D.Chappellaz, J.2022-11-232022-11-232022-11-231999-02-0110.1007/BF02885500https://infoscience.epfl.ch/handle/20.500.14299/192719WOS:000079646600026Variation of CH4 concentrations recorded in Dunde ice core bubblestext::journal::journal article::research article