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Guo, F. (1982). Gastropoda. In: Xi'an Institute of Geology and Mineral Resources (Ed.) Paleontological Atlas of Northwest China. Shaanxi Gansu Ningxia Volume. Part I Precambrian and Early Paleozoic. Geological Publishing House, Beijing, pp. 181-187.
Guo, F. (1982). Gastropoda. In: Xi'an Institute of Geology and Mineral Resources (Ed.) Paleontological Atlas of Northwest China. Shaanxi Gansu Ningxia Volume. Part I Precambrian and Early Paleozoic. Geological Publishing House, Beijing, pp. 181-187.
