Dudley, Underwood. <br/><br/>
Elementary number theory. 

 - San Francisco,  W. H. Freeman  [1969] 
 - A Series of books in mathematics .
<br/><br/>Bibliography: p. [187]-189. 
<br/><br/><label>ISBN: </label>0716704382  8.50 
<br/><br/><label>LCCN: </label>71080080 //r90 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number theory.
<br/><br/><label>LC Class. No.: </label>QA241  / .D79 
<br/><br/><label>Dewey Class. No.: </label>512/.81