Our world of science / 
edited by Janaki Galappatti and Nirmali Hettiarachchi 
 - Colombo :  The British Council, Colombo,  c1990. 
 - 82 p. ;  ill. ;  22 cm. 
<br/><br/>
<br/><br/><label>ISBN: </label>9559055135 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>LC Class. No.: </label>Q163  / .O97 1990