Xiao Chuan-tao, Xiao Yun-peng, Song Zhen-yu, Huang Yun-fei, Dong Man . Discovery of bioturbated thrombolites in the Lower Ordovician of Songzi area，Hubei Province[J]. Natural Gas Geoscience, 2018 , 29(8) : 1078 -1084 . DOI: 10.11764/j.issn.1672-1926.2018.06.001

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