Buell, Dincan A. <br/><br/>
Binary quadratic forms.   
by Dincan A. Buell. 
 - New York  Springer-Verlag  1989 
<br/><br/><label>ISBN: </label>0387970371 
<br/><br/><label>Dewey Class. No.: </label>512.942  / N891;1