Hardly, G.H <br/><br/>
An introduction to the theory of numbers 

 - 5th  
 - New York:  Oxford University Press,  1979. 
 - xvi, 426 p.;  ill.;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9780198531715 
<br/><br/><label>LC Class. No.: </label>DUCE QA24.1.H3