TY  - BOOK
AU  - Darwin,Charles
TI  - The origin of the species by means of  natural selection  : : The d escent of man  and selection in relation to sex  / 
SN  - 0852291639
U1  - 808 
PY  - 1952///
CY  - Chicago : 
PB  - Encyclopaedia  Britannica, 
KW  - Evolution
KW  - Origin of species
KW  - Natural selections
N1  -  Includes index
ER  -