Kōpālakiruṣṇan̲, Kalvi,  1912- <br/><br/>
Mūḷaikku vēlai. 

 -  [1962?] 
 - 103 p. :  illus.  18 cm. 
<br/><br/> In Tamil. 
<br/><br/><label>LCCN: </label>sa 64006446  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical recreations.
<br/><br/><label>LC Class. No.: </label>QA95  / .G66