TY  - BOOK
AU  - Williams, George Christopher
ED  - University of Oxford
TI  - Natural selection: Domains, levels, and challenges 
T2  - Oxford series in ecology and evolution
SN  - 0195069331
AV  - QH375 W55
PY  - 1992///
CY  - New York
PB  - Oxford University Press
KW  - Selección natural
ER  -