@book{6418,
	author = {Murdin, Paul,},
	title = {Encyclopedia of Astronomy and Astrophysics V.1-V.4},
	publisher = {Nature,},
	year = {2001},
	address = {London :},
	note = {V.1 A-Gel, V.2 Gem-N, V.3 O-Sol, V.4 Sol-Z, Index}
}