@book{21395,
	author = {Cavin, Jerry D. },
	title = {The Amateur Astronomer's Guide to the Deep-Sky Catalogs},
	publisher = {Springer New York},
	year = {2012},
	series = {The Patrick Moore Practical Astronomy Series},
	address = {New York},
	url = {http://doi.org/10.1007/978-1-4614-0656-3}
}