Sunspot drawing of 1964-5-13

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https://doi.org/10.7891/e-manuscripta-93928



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1964-05-13
07:15
Hs 1304.5:2273
https://doi.org/10.7891/e-manuscripta-93928
Observer : Sergio Cortesi
Seeing (SIDC) : 4
No group