Mwangi, G. et al. <br/><br/>
Mentor Science and Technoogy Grade 4 
G. Mwangi, J. Mugo, J. N. Gathongo, P. Karumbu and Z. Muchunku 
 - 1st ed. 
 - Nairobi ;  Mentor Publishers ,  2019 . 
 - 182 P. ;  Col. Illustrations ,  17 cm. 
<br/><br/><label>ISBN: </label>978-9966-012-71-5 
<br/><br/><label>Dewey Class. No.: </label>372