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Matter Composition and Two Stage Evolution of a Liangshan Super High-Sulfur Coal Seam in Kaili,Eastern Guizhou[J]. YI Tong-sheng1,2,QIN Yong1,ZHANG Jing1,WU Yan-yan1,LI Zhuang-fu1 1Institute of Mineral Resources and Geoscience,China University of Mining & Technology,Xuzhou,Jiangsu 221008,China 2Guizhou Administration of Coal Geology,Guiyang,Guizhou 550006,China.Journal of China University of Mining & Technology. 2007(02)