TY  - BOOK
AU  - Ford,E.B.
TI  - Genetic polymorphism / 
U1  - 575.12 FOR 
PY  - 1965///
CY  - London 
PB  - Faber nd Faber, 
KW  - Genetic polymorphisms
N1  -  "References": p. 90-97
ER  -