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Guo, F. (1983). Gastropoda. In: Xi'an Institute of Geology and Mineral Resources (Ed.) Paleontological Atlas of Northwest China. Shaanxi, Gansu and Ningxia Volume. Part II Upper Palaeozoic. Geological Publishing House, Beijing, pp. 438-451.
Guo, F. (1983). Gastropoda. In: Xi'an Institute of Geology and Mineral Resources (Ed.) Paleontological Atlas of Northwest China. Shaanxi, Gansu and Ningxia Volume. Part II Upper Palaeozoic. Geological Publishing House, Beijing, pp. 438-451.
