Reference

	Building a Small Observatory: Lessons from Builders by Charles A. Ennis Year: 2016 Hits: 7263 Date insert: Monday, 31 December 2018
	Canada star watch the essential guide to our night sky by Mike Lynch Year: 2007 Hits: 2439 Date insert: Monday, 31 December 2018
	Celestial Objects for Common Telescopes by Thomas William Webb Year: 1962 Hits: 3591 Date insert: Monday, 31 December 2018
	Challenges of Astronomy: Hands-on Experiments for the Sky and Laboratory by E.F. Milone, W. Schlosser, T. Schmidt-Kaler Year: 1994 Hits: 3538 Date insert: Monday, 31 December 2018
	Constellation Guide Book by Daniel R. Altschuler, Lloyd Motz Year: 1999 Hits: 4852 Date insert: Monday, 31 December 2018