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Yu, W.; Tang, Y.-H. (1974). Permian gastropods. In: Nanjing Institute of Geology and Palaeontology, Academia Sinica (Ed.) A Handbook of the Stratigraphy and Paleontology in Southwest China. Science Press, Beijing, pp. 300-302.
Yu, W.; Tang, Y.-H. (1974). Permian gastropods. In: Nanjing Institute of Geology and Palaeontology, Academia Sinica (Ed.) A Handbook of the Stratigraphy and Paleontology in Southwest China. Science Press, Beijing, pp. 300-302.
