Yokoyama, M. (1925). Molluscan remains from the uppermost part of the Jô-ban coal-field. Journal of the College of Science, Imperial University, Tōkyō. 45(5): 1-34, pls. 1-6.
353863
Yokoyama, M.
1925
Molluscan remains from the uppermost part of the Jô-ban coal-field
Journal of the College of Science, Imperial University, Tōkyō