北京西山下苇甸剖面寒武系徐庄组鲕粒研究
邢延路
, 冯李强
A study on ooids in limestones of the Cambrian Xuzhuang Formation at Xiaweidian outcrop in Western Hill of Beijing
Xing Yanlu
, Feng Liqiang
北京下苇甸剖面寒武系徐庄组特殊组构