Sunspot drawing of 1975-10-31

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https://doi.org/10.7891/e-manuscripta-98095



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1975-10-31
07:00
Hs 1304.5:5827
https://doi.org/10.7891/e-manuscripta-98095
Observer : Araldo Pittini
Seeing (SIDC) : 3
No group