Number theory:  a primer/ 
Ryan V. Dio 
 - Quezon City:  Great Books Trading,  2017. 
 - vii, 122 pages:  illustrations;  22 cm. 
<br/><br/> Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9789719645412 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number theory
<br/><br/><label>LC Class. No.: </label>Fil QA 241 .D56 2017