Matsui, M. (1958). Species of the genus Neptunea from the Palaeogene formations in the Kushiro coal-field, Hokkaido, Japan. Transactions and Proceedings of the Palaeontological Society of Japan. N.S., N 30: 201-210.
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Matsui, M.
1958
Species of the genus Neptunea from the Palaeogene formations in the Kushiro coal-field, Hokkaido, Japan
Transactions and Proceedings of the Palaeontological Society of Japan