Sunspot drawing of 1973-7-23

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https://doi.org/10.7891/e-manuscripta-97465



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1973-07-23
08:00
Hs 1304.5:5125
https://doi.org/10.7891/e-manuscripta-97465
Observer : Araldo Pittini
Seeing (SIDC) : 3
No group