TY  - BOOK
AU  - Benjamin, B.
TI  - Elements of Vital Statistics
U1  - 613.942 
PY  - 1959///
CY  - London
PB  - George Allen & Unwin
KW  - Child Welfare
KW  - Fertility-Measurement
KW  - Maternity
N1  - Includes bibliographical references and index
ER  -