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Sunspot observation by the cooperation of amateur astronomers and researchers in Japan in early 20th century as early citizen science program
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- Journal:
- Proceedings of the International Astronomical Union / Volume 15 / Issue S367 / December 2019
- Published online by Cambridge University Press:
- 23 December 2021, pp. 336-338
- Print publication:
- December 2019
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- Article
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