Sekhar M. <br/><br/>
Environmental science / 
M. Chandra Sekhar and E. Sankara Rao 
 - 1st ed. 
 - Hyderabad :  The HI-tech Publishers,  2004. 
 - 169 p. ;  ill . :  25 cm. 
<br/><br/>It includes bibliographical information. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Enviromental science<br/>Pollution<br/>Biodiversity
<br/><br/><label>Dewey Class. No.: </label>363.7  / SEK