Asthana, D. K <br/><br/>
a textbook of environmental studies / 
D. K. Asthana 
 - New Delhi :  S Chand  2010 
 - 460p.  22cm 
<br/><br/>Include Index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Engineering
<br/><br/><label>Dewey Class. No.: </label>372.83   / AST