Yokoyama M. (1926). Fossil shells from Sado. <em>Journal of the Faculty of Science, Imperial University of Tokyo. Section II, Geology, Mineralogy, Geography, Seismology.</em> 1(8): 249–312, pls. 32–37., available online athttp://umdb.um.u-tokyo.ac.jp/DKoseibu/pdf/Ref_0483_.pdf[details] Available for editors [request]
original descriptionYokoyama M. (1926). Fossil shells from Sado. <em>Journal of the Faculty of Science, Imperial University of Tokyo. Section II, Geology, Mineralogy, Geography, Seismology.</em> 1(8): 249–312, pls. 32–37., available online athttp://umdb.um.u-tokyo.ac.jp/DKoseibu/pdf/Ref_0483_.pdf[details] Available for editors [request]