@book{75680,
	author = {Comstock, George C.},
	title = {A Text-Book of Astronomy},
	publisher = {Project Gutenberg,},
	year = {2011},
	address = {Salt Lake City, UT :},
	note = {Release date is 2011-01-03},
	url = {https://www.gutenberg.org/ebooks/34834}
}