Zheng , H. (1986). 湖北大峡口栖霞阶小有孔虫动物群 - The smaller foraminifers faunas in Qixia stage (Early Permian) of Daxiakou, Xingshan County, Hubei Province. [in Chinese]. Earth Science, Journal of Wuhan College of Geology. 11: 489–497.
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Zheng , H.
1986
湖北大峡口栖霞阶小有孔虫动物群 - The smaller foraminifers faunas in Qixia stage (Early Permian) of Daxiakou, Xingshan County, Hubei Province. [in Chinese]
Earth Science, Journal of Wuhan College of Geology