TY  - BOOK
AU  - Keyfitz,Nathan.
TI  - Applied Mathematical Demography
SN  - 0-471-47350-2
U1  - 304.601 KEY 
PY  - 1977///
CY  - New York
PB  - John Wiley and Sons,Inc
KW  - Mathematics, Mortality Comparisons;The Male Female Ratio,The Life Table
ER  -