中国北方二叠系上统石千峰组泥质岩的工程特性及其微观研究
중국북방이첩계상통석천봉조니질암적공정특성급기미관연구
The Engineering Specific Characteristics & Its Microcosmic Study on the Pelite in Shiqianfeng Group Upper Permian System in the North of China