@book{68386,
	author = {William Gaertner and Company},
	title = {Astronomical Instruments and Accessories},
	publisher = {Project Gutenberg,},
	year = {2008},
	address = {Salt Lake City, UT :},
	note = {Release date is 2008-12-10},
	url = {https://www.gutenberg.org/ebooks/27477}
}