@book{20974,
	author = {Simpson, Phil },
	title = {Guidebook to the Constellations},
	publisher = {Springer New York},
	year = {2012},
	series = {The Patrick Moore Practical Astronomy Series},
	address = {New York},
	url = {http://doi.org/10.1007/978-1-4419-6941-5}
}