Tanaka, K. & Obata, I. 1982. Selected echinoid fossils from the Miyako Group (Lower Cretaceous), northeast Honshu, Japan. Bulletin of the National Science Museum, Series C (Geology & Paleontology) 8, 117-143.
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Tanaka, K.; Obata, I.
1982
Selected echinoid fossils from the Miyako Group (Lower Cretaceous), northeast Honshu, Japan
Bulletin of the National Science Museum, Series C (Geology & Paleontology