北京十三陵地区中侏罗统九龙山组硅质岩成因模式及地质意义
李昆鹏, 邢超超, 沈冰

Analysis of genetic model of siliceous rocks of the Middle Jurassic Jiulongshan Formation in Ming Tombs area in Beijing and their geological significance
Li Kun-Peng, Xing Chao-Chao, Shen Bing
北京十三陵地区古地理图(a,据 王鸿祯,1985 ;有修改)及九龙山组剖面地层柱状图(b)