Saul, Amrk, <br/><br/>
Mathematical circles : russian experience 

 - Hyderabad:  Universities Press (India) Pvt.,  2022. 
 - XI, 272. 
<br/><br/><label>ISBN: </label>9788173711152 
<br/><br/><label>Dewey Class. No.: </label>510  / SAU