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Teo

30 Mar 2016 07:00



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http://www.deepskywatch.com/messier-dso-sketches.html
http://www.deepskywatch.com/deepsky-atlas.html
http://www.deepskywatch.com/deepsky-guide.html
http://www.deepskywatch.com/files/dso-guide/DSO-observer-guide-full.pdf

