TY  - BOOK
AU  - Ansell,Charles
TI  - On the rate of mortality at early periods of life, the age at marriage, the number of children to a marriage, the length of a generation, and other statistics of families in the upper and professional classes
PY  - 1874///
CY  - London
PB  - National Life Assurance Society
KW  - Mortality
KW  - Vital statistics
ER  -