TY  - BOOK
AU  - Sheppard P.M.
TI  - Natural selection and heredity 
U1  - 575.1 SHE  
PY  - 1958///.
CY  - London : 
PB  - Hutchinson university library, 
KW  - Natural selection
KW  - Genetics
N1  - Includes index
ER  -