Study on palaeo-productivity of the lake during the deposition of the 1st member of Shahejie Formation in Dongying sag
Li Shoujun, Wang Jicun, Zheng Deshun, Jiao Yehong, Wang Jinxiang, Li Xueyan
Oil & Gas Geology . 2004, (6): 656 -658 .  DOI: 10.11743/ogg20040611