TY  - GEN
AU  - Birkhead, Mike
AU  - Birkhead,Tim
TI  - The Survival factor
SN  - 1852832452
U1  - 591.5 
PY  - 1989///
CY  - London
PB  - Boxtree
KW  - ANIMALS
KW  - ZOOLOGY
ER  -