Hypersthene from Hokkaidō Prefecture, Japan
Japan | |
| H. Okada (1964) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 15, #1, 23-38. |
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| Katsu, Y. and Satoh, H. (1963) Explanatory text of the geological map of Japan, scale 1:50,000, Mokoto-yama (Abashiri-49) (Geological Survey of Japan) |
| Suzuki, J. et al (1957) Journal of the Faculty of Science, Hokkaido University, Ser. 4, 9, 501-518. |