Davidoff, Giuliana P. <br/><br/>
Elementary number theory, group theory, and Ramanujan graphs / 
Guiliana Davidoff, Peter Sarnak, Alain Valette. 
 - New York :  Cambridge University Press,  2003. 
 - viii, 144 p. :  ill. ; 
<br/><br/><label>ISBN: </label>0521824265 0521531438 (pb.) 
<br/><br/><label>Subjects--Index Terms: </label>Garph theory Number theory Group theory 
<br/><br/><label>Universal Decimal Class. No.: </label>519.17  / DAV