TY  - BOOK
AU  - Retherford Robert D
TI  - Changing sex differential in mortality
T2  - Studies in Population and Urban Demography.1
U1  - Y:53-55.1.N7s, L5 
PY  - 1975///
CY  - Connecticut
PB  - Greenwood Press         
KW  - Fertility
N1  - Bibliography: p 127-34; Appendix: p 107-26
ER  -