Okello, Peter . <br/><br/>
Queenex Mathematical Activities  ;  Pupil Book . 
Quatertoid Printabilities India . 
 - 1st edition.  
 - Nairobi  :  Queenex Publishers.   2018.  
 - 65 p . ;  col.illustrations .  17 cm . 
<br/><br/><label>ISBN: </label>978-9966-075-72-7 
<br/><br/><label>Dewey Class. No.: </label>510