TY  - BOOK
AU  - Leakey,Richard
AU  - Lewin,Roger
TI  - The sixth extinction: biodiversity and its survival 
SN  - 1857994736
U1  - 576.84 23
PY  - 1998///
CY  - London
PB  - Phoenix
KW  - Evolution
KW  - Evolución
ER  -