Fourth symposium on our environment :  proceedings of the fourth symposium on our environment, held in Singapore, May 21-23, 1990 / 
edited by Hian Kee Lee 
 - Dordrecht  Kluwer Academic Publishers  1991 
 - 547 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>0792315626 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental protection--Asia--Congresses<br/>Environmental protection--Pacific Area--Congresses<br/>Pollution--Measurement--Congresses