Ludwig, Harvey F. <br/><br/>
Manual of environmental technology in developing countries / 
Harvey F. Ludwig 
 - Vol. II 
 - New Delhi :  South Asian Publishers,  1991 
<br/><br/>Includes references & index. 
<br/><br/><label>ISBN: </label>8170031346 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental technology
<br/><br/><label>Dewey Class. No.: </label>628  / LUD