Yokoyama M. (1926). Tertiary Mollusca from the oil-fields of Embets and Etaibets. Journal of the Faculty of Science, Imperial University of Tokyo. Section II, Geology, Mineralogy, Geography, Seismology. 1(7): 235–248, pls. 30–32.
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Yokoyama M.
1926
Tertiary Mollusca from the oil-fields of Embets and Etaibets
Journal of the Faculty of Science, Imperial University of Tokyo. Section II, Geology, Mineralogy, Geography, Seismology