Arya, Shrinivan  <br/><br/>
प्रयावरण और शोधन 
 Payavaran aur shodhan 

 - New Delhi:   Vikas Paperbacks,   2003 
 - 72p. 
<br/><br/><label>ISBN: </label>81-88124-29-X  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental science
<br/><br/><label>Universal Decimal Class. No.: </label>504   / P3