Silverman, Joseph H. <br/><br/>
Friendly introduction to number theory   
by Joseph H. Silverman 
 - 2nd ed. 
 - New Jersy  Prentice Hall  2001 
 - vii, 386p. 
<br/><br/><label>ISBN: </label>0130309540 
<br/><br/><label>Dewey Class. No.: </label>512.7  / P012