Graptolites zone and sedimentary characteristics of Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation in Sichuan Basin and its adjacent areas
Nie Haikuan, Jin Zhijun, Ma Xin, Liu Zhongbao, Lin Tuo, Yang Zhenheng
Acta Petrolei Sinica . 2017, (2): 160 -174 .  DOI: 10.7623/syxb201702004

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