TY  - BOOK
AU  - Okasha Samir
TI  - Evolution and the levels of selection
SN  - 9780199267972 (hbk)
U1  - R39(G:66), P6 
PY  - 2006///
CY  - Oxford
PB  - Clarendon Press U.S.A      
KW  - PHILOSOPHY
ER  -