TY  - BOOK
AU  - Simpson,George Gaylord
TI  - The meaning of evolution
T2  - A Mentor book,
AV  - QH366 .S58 1958
U1  - 575 
PY  - 1958///
CY  - New York
PB  - New American Library
KW  - Evolution (Biology)
KW  - Evolution
ER  -