Okimura, Y. (1972). Permo-Carboniferous endothyraceans from Japan; Part 1: Biseriamminidae. Transactions & Proceedings of the Palaeontological Society of Japan New Series. 87: 414-428.
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Okimura, Y.
1972
Permo-Carboniferous endothyraceans from Japan; Part 1: Biseriamminidae.
Transactions & Proceedings of the Palaeontological Society of Japan New Series