TY  - BOOK
AU  - Darwin,Charles R
AU  - Darwin,Charles Robert
TI  - The origin of species by means of natural selection. The descent of man and selection in relation to sex
PY  - 1955///
CY  - Chicago
PB  - Encylopedia Britannica
KW  - Evolution
KW  - Natural selection
KW  - Heredity
KW  - Human beings
KW  - Origin
N1  - Includes bibliographical footnotes; Closed
ER  -