Hardy, G. H. <br/><br/>
An introduction to the theory of numbers / 
G. H. Hardy, E. M. Wright. 
 - ELBS ed. of 5th ed. 
 - Oxford :  English Language Book Society and Oxford University Press,  1981. 
 - xvi, 426 p. :  23 cm. 
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<br/><br/><label>ISBN: </label>0194423646 
<br/><br/><label>LCCN: </label>91026173 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number theory.<br/>Mathematics.