Sunspot drawing of 1975-4-22

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https://doi.org/10.7891/e-manuscripta-98006



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1975-04-22
07:00
Hs 1304.5:5658
https://doi.org/10.7891/e-manuscripta-98006
Observer : Araldo Pittini
Seeing (SIDC) : 4
No group