Krebs, J. R. <br/><br/>
An introduction to behavioural ecology / 
J.R. Krebs, N.B. Davies. 
 - Oxford :  Blackwell Scientific Publications,  1981. 
 - ix, 292 p. :  ill. ;  25 cm. 
<br/><br/>Includes index and references. 
<br/><br/><label>ISBN: </label>0632006668 0878934316 0632006684 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoology.<br/>Evolution.