Allison, Mark. <br/><br/>
Star clusters and how to observe them / 
Mark Allison. 
 - [S.l.] :  Springer,  2006. 
 - 212 p. ;  24 cm. 
 - Astronomers' observing guides. .
 - Astronomers' observing .
<br/><br/><label>ISBN: </label>1846281903 9781846281907 
<br/><br/><label>Dewey Class. No.: </label>523.85