Behavioral ecology  an evolutionary approach 
ed. by J. R. Krebs, N. B. Davies. 
 - 3rd. 
 - Oxford  Blackwell Scientific  1991 
 - xi, 482p  incl. bib. ref & index 
<br/><br/><label>ISBN: </label>0632027029 
<br/><br/><label>Dewey Class. No.: </label>591.5  / N91-N91;3