冀中坳陷下第三系生物相带的划分及其意义
杨时中, 刘东方, 郑国光, 唐升层
THE DIVISION OF BIOFACIES IN PALEOGENE IN JIZHONG DEPRESSION AND ITS SIGNIFICANCE
Yang Shizhong, Liu Dongfang, Zheng Guoguang, Tang Shengceng
石油学报 . 1992, (2): 51 -59 .  DOI: 10.7623/syxb199202010