Sunspot drawing of 1964-2-4

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https://doi.org/10.7891/e-manuscripta-93964



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1964-02-04
09:00
Hs 1304.5:2201
https://doi.org/10.7891/e-manuscripta-93964
Observer : Sergio Cortesi
Seeing (SIDC) : 2
No group