Verma, P.S. <br/><br/>
Environmental biology:  principles of ecology 

 - 2nd ed. 
 - New Delhi  S. Chand  2017 
 - 591p. 
<br/><br/><label>ISBN: </label>9788121908597  295 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Dewey Class. No.: </label>570 VER P