COnyango. <br/><br/>
The World environment 1972-1992 :  two decades of challenge / 
Edited by Mostafa K. Tolba. 
 - London :  Chapman & Hall,  c1992. 
 - 884 p. :  ill. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0412470004 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental protection.<br/>Human ecology.
<br/><br/><label>LC Class. No.: </label>GF50  / .T66