Yokoyama, M. (1926). Fossil Mollusca from the oil-fields of Akita. Journal of the Faculty of Science, Imperial University of Tokyo. Section II, Geology, Mineralogy, Geography, Seismology. 1(9): 377–389, pls. 44–45.
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Yokoyama, M.
1926
Fossil Mollusca from the oil-fields of Akita
Journal of the Faculty of Science, Imperial University of Tokyo. Section II, Geology, Mineralogy, Geography, Seismology