Sapru R.K ed.  _ <br/><br/>
the new environmental age 

 - New Delhi  Ashish publishing house  1990 
 - xix,418p.  HB  22cm. 
<br/><br/><label>ISBN: </label>8170243394 
<br/><br/><label>Dewey Class. No.: </label>577  / SAP