World environment day June 2011 :  on the theme of "forests - nature at your service". 
 Journal 

 - Lahore :  Pakistan Engineering Congress,  2011. 
 - 96 pages ;  plates, color illustrations, graphs. 
<br/><br/>Includes bibliographies 
<br/><br/><br/>In English 
<br/><br/> Pbk. 
<br/><br/><label>ISBN: </label>978-969-603-000-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Engineering
<br/><br/><label>Dewey Class. No.: </label>621.2 WOR 2011