Krebs, J.R. and  N.B. Davies <br/><br/>
An introduction to behavioural ecology  

 - Blackwell Scientific Pub  Oxford   1993 
<br/><br/><label>ISBN: </label>0-632-03546-3 
<br/><br/><label>LC Class. No.: </label>QH 366.2  / K7 1993