Sharma,P.D <br/><br/>
Elements of Ecology/ 
by P.D.Sharma  
 - 5th ed. 
 - Meerut:  Rastogi Publications,  1987. 
 - xiv,422p. 
<br/><br/> Foreword by R.Misra 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>577  / SHA/E