Purohit, S S. <br/><br/>
Environmental sciences : a new approach. 

 - Rept.2006 
 - Jodhpur  Agrobios  2006 
 - 397 p. 
<br/><br/><label>ISBN: </label>8177542109 
<br/><br/><label>Dewey Class. No.: </label>363.7