Indatissa, Nalini <br/><br/>
Secondary Science and Technology : book 9 

 - Kurunegala :  IBH pub,  2004. 
 - 156p.;  Col.ill.;  25cm 
<br/><br/><label>ISBN: </label>955-8975-00-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science &Technology<br/>Science
<br/><br/><label>Dewey Class. No.: </label>507  / IND