Tanaka, K. & Okubo, M. 1954. On some echinoids from the Paleo-Cretaceous of the Yuasa District in the Kii Peninsula and of the Yatsushiro District in Kyushu. The Journal of the Geological Society of Japan, new series 60, 215-227.
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Tanaka, K.; Okubo, M.
1954
On some echinoids from the Paleo-Cretaceous of the Yuasa District in the Kii Peninsula and of the Yatsushiro District in Kyushu
The Journal of the Geological Society of Japan, new series