Jeyaweera, Upali. <br/><br/>
Science Workbook - Grade 6. 

 - 1st ed. 
 - Colombo :  Samudra Book Publications,  2015. 
 - 106 p. 
<br/><br/><label>ISBN: </label>9789556804089 
<br/><br/><label>Dewey Class. No.: </label>500  / JEY