The Penguin  dictionary of mathematics / 
edited by David Nelson. 
 - 4th  ed. 
 - London :  Penguin,  2008. 
 - 480  p. 
<br/><br/><label>ISBN: </label>0141030234 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Dictionaries.