Guy, Richard K. <br/><br/>
Unsolved problems in number theory / 
[by] Richard K. Guy. 
 - New York :  Springer-Verlag,  1981. 
 - xviii, 161 p. 
 - Unsolved problems in intuitive mathematics ;  v.1 .
<br/><br/><label>ISBN: </label>0387905936 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number theory.