YAO Jianxin ),JI Zhansheng ),WANG Liting ),WANG Yanbin ),WU Guichun ) ) Institute of Geology, Chinese Academy of Geological Sciences, Beijing, ) Bureau of Geological, Mineral Resources Survey of Guizhou Province, Guiyang,.2004. Research on Conodont Biostratigraphy near the Bottom Boundary of the Middle Triassic Qingyan Stage in the Southern Guizhou Province[J]. Acta Geologica Sinica,78(5):
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