TY  - BOOK
AU  - Murton,R.K..
AU  - Westwood,Westwood  .
TI  - Avian breeding cycles / 
SN  - 019857357x
U1  - 598 
PY  - 1977///
CY  - Oxford : 
PB  - Clarendon press , 
KW  - BIRDS-REPRODUCTION
N1  - includes bibliography and index
ER  -