TY  - BOOK
AU  - Ridley, Matt.
TI  - The origin of virtue
SN  - 9780140244045
U1  - 304.5 
PY  - 1997///
CY  - London
PB  - Penguin books
KW  - Altruism
KW  - Genetic factor
KW  - Social behaviour
ER  -