TY  - BOOK
ED  - United States.
TI  - Comparability ratios based on mortality statistics for the fifth and sixth revisions
U1  - 304.64 
PY  - 1964///
CY  - Washington, D.C.
PB  - Department of health, education, and welfare
KW  - Mortality
KW  - Life Expectancy
N1  - Cover title
ER  -