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Ehiro |
1998 |
Ammonoid biostratigraphy of the Middle Permian in the South Kitakmi Belt, Japan, and correlation with the reference sections on the Tethyan Region and North America.
Proceedings of the Royal Society of Victoria, 110 (1/2): 147-156, 4 figs., Melbourne.
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Hayasaka |
1954 |
Younger Paleozoic cephalopods from the Kitakami Mountains, Japan.
Journal of the Faculty of Science, Hokkaido University, (4) 8: 361-374, pl.22-23.
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