@book{21501,
	author = {Marett-Crosby, Michael },
	title = {Twenty-Five Astronomical Observations That Changed the World},
	publisher = {Springer New York},
	year = {2013},
	series = {The Patrick Moore Practical Astronomy Series},
	address = {New York},
	url = {http://doi.org/10.1007/978-1-4614-6800-4}
}