Yabe, H. & Nagao, T. (1928). Cretaceous fossils from Hokkaido: Annelida, Gastropoda and Lamellibranchiata. The Science Reports of the Tōhoku University, Series 2, Geology. 9: 77-96.
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Yabe, H. & Nagao, T.
1928
Cretaceous fossils from Hokkaido: Annelida, Gastropoda and Lamellibranchiata
The Science Reports of the Tōhoku University, Series 2, Geology