Nagell, Trygve <br/><br/>
Introduction to number theory / 

 - Providence:  American Mathematical Society,  1964 
 - 309p. Index Bibl. Index. 
<br/><br/><label>ISBN: </label>978-1470463243 
<br/><br/><label>Dewey Class. No.: </label>512.7  / N147.IN