Yabmay say sum / 

 - Thimphu :  Kuensel Corporation,  c2017. 
 - 93 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>NA 
<br/><br/><label>LC Class. No.: </label>D4149-D4150 
<br/><br/><label>Dewey Class. No.: </label>954.98  / BHU