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Precambrian phosphatized embryos and larvae from the Doushantuo Formation and their affinities, Guiz
Weng,an phosphates of the Precambrian Dou-shantuo Formation, Guizhou (southwestern China) preserve a large number of exq......
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

