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地层特征及主要鲕粒类型