Environmental ecology   
ed. by P. R. Trivedi and Gurdeep Raj 
 - New Delhi  Akashdeep Pub.  1992 
 - v, 502p. 
 - Encyclopaedia of environmental Sciences - 6 .
<br/><br/><label>ISBN: </label>8171582435 
<br/><br/><label>Dewey Class. No.: </label>363.7  / N92.6;1