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.
425753
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