s.s  dara <br/><br/>
a text book of envirormental chemistry and pollution control 

 - RAM NAGAR ,NEW DELHI  S.CHAND &COMPANY LTD   1993 
<br/><br/><label>ISBN: </label>81-219-0883-3 
<br/><br/><label>Dewey Class. No.: </label>540.15  / DAR/A