@book{94328,
	author = {Calver, George,},
	title = {New Edition of Hints on Silver-Glass Reflecting Telescopes Manufactured by Mr. G. Calver, F.R.A.S. :},
	publisher = {Project Gutenberg,},
	year = {2016},
	address = {Salt Lake City, UT :},
	note = {Release date is 2016-11-10},
	url = {https://www.gutenberg.org/ebooks/53494}
}