Sunspot drawing of 1973-12-4

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https://doi.org/10.7891/e-manuscripta-97424



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1973-12-04
08:00
Hs 1304.5:5248
https://doi.org/10.7891/e-manuscripta-97424
Observer : Araldo Pittini
Seeing (SIDC) : 2
No group