Callenbach, Ernest. <br/><br/>
Ecology : a pocket guide /  
Ernest Callenbach. 
 - /   . 
 - Hyderabad :   Universities Press ,   2004. 
 - 10 ,154p. :   picts. ;   18cm .  
<br/><br/>Include index 
<br/><br/><label>ISBN: </label>817371178X  Rs. 165.00 
<br/><br/><label>Subjects--Index Terms: </label>ECOLOGY 
<br/><br/><label>Dewey Class. No.: </label>577  / CAL/E