Sierpinski, W. <br/><br/>
250 problems in elementary number theory / 
W. Sierpinski 
 - New York :  American Elsevier Publishing,  1970 
 - vii, 125 p. ;  23 cm. 
 - Modern analytic and computational methods in science and mathematics ;  no.26 .
 - Modern analytic and computational methods in science and mathematics ;  v. 26 .
<br/><br/>Bibliography : p. 123-124 Includes index 
<br/><br/><label>ISBN: </label>444000712 
<br/><br/><label>LCCN: </label>68-017472 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number theory--Problems, exercises, etc.