TY  - BOOK
AU  - Balmer,M.G.
TI  - The biology of twinning in man
U1  - 618.25 
PY  - 1970///
CY  - London
PB  - Oxford University Press
KW  - Genetics
KW  - Mutation (Biology)
KW  - Research
KW  - Pregnancy
KW  - Signs and diagnosis
KW  - Chromosomes, Abnormalitics
N1  - Includes index; Bibliography: p. 183
ER  -