Hardy, G. H. <br/><br/>
Introduction to the theory of numbers / 
by Hardy, G. H. 
 - 6th ed. / 
 - Oxford ; | New York :  Oxford University Press ;  2008 
 - xxi, 621 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>9780199219858 | 9780199219865