Zonation of the Early Permian fusulinid - bearing strata in Inner Mongolia. Zhongguo Gu Shengwu Xuehui Di-IZ jie Xueshu Nianhui lunwen xuanji. [12th Annual Conference of the Palaeontologica Society of China. Selected Paper.], 1981: 6-14. Chapter pagination: 116-126. 121 [Zoological Record Volume 119]