Humphreys, J. F <br/><br/>
Numbers, groups and codes  / 

 - 2nd 
 - Cambridge:  Cambridge University Press,  2004 
 - xvi, 338p. Bibl. Index. 
<br/><br/><label>ISBN: </label>052154050X 
<br/><br/><label>Dewey Class. No.: </label>512.7  / H927.NG