Agarwal, S. K <br/><br/>
Environmental monitoring 
S.K. Agarwal 
 - New Delhi  APH Publishing corporation  2005 
 - 300 p.; 23 cm 
<br/><br/><label>ISBN: </label>9788176488242 
<br/><br/><label>Dewey Class. No.: </label>363.7063 AGA