DAVIDOFF,G & OTHERS <br/><br/>
ELEMENTARY NUMBER THEORY ,GROUP THEORY, AND RAMANUJAN GRAPHS 

 - Cambridge  Cambridge University Press  2003 
 - viii+144p.,23X15Cms. 
<br/><br/><label>ISBN: </label>0-521-53143-8 
<br/><br/><label>Dewey Class. No.: </label>511.5 D254