He Chengquan et al., 1989

He Chengquan, Zhu Shenzhao and Jin Guangxing, 1989: Early Tertiary microphytoplankton from the Dongpu Region. Series on Stratigraphy and Palaeontology of Oil and Gas Bearing Areas in China, 99 p., 31 pl.; Research Institute of Exploration and Development, Zhongyuan Petroleum Exploration Bureau, Nanjing Institute of Geology and Palaeontology, Academia Sinica - The Petroleum Industry Press - Nanjing, China. (In Chinese with English summary.)