Sharma P D <br/><br/>
Ecology and environment. 
Sharma P D 
 - Meerut  Rastogi Publications        1993 
 - xv,519p  cm. 
<br/><br/><label>Standard No.: </label>25247 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>G:55.2'N9, N3