TY  - BOOK
AU  - Krebs J R
AU  -  Davies N B
TI  - Introduction to behavioural ecology
U1  - G:66, M1 
PY  - 1981///
CY  - Oxford
PB  - Blackwell Scientific Publication       
KW  -  Ecology
KW  - Biology
N1  - Bibliography 265-78p
ER  -