TY  - BOOK
AU  - Spencer,Herbert
ED  - Williams and Norgate.
TI  - The principles of biology / 
T2  - A System of Synyhetic Philosophy ; 
PY  - 1898///-1899 (
CY  - [London] : 
PB  - Williams and Norgate, 
KW  - Biología
KW  - embne
N1  - Con propaganda ed
ER  -