00341nam a2200109Ia 4500008004100000020001800041040002900059050002200088100003300110245004400143260004400187230222s9999||||xx |||||||||||||| ||und||  a0-632-03546-3  cChuka University Library  aQH 366.2bK7 1993  aKrebs, J.R. and  N.B. Davies 3aAn introduction to behavioural ecology   aBlackwell Scientific PubbOxford c1993