1. Relationships between pregnancy spacing, sex of infants, maternal age and birth order, and neonatal and post-neonatal mortality in Bangladesh;Swenson;Social Biol.,1981
2. Early childhood survivorship related to the subsequent interpregnancy interval and outcome of subsequent pregnancy;Swenson;Trop. pediat. envir. child Hlth,1978
3. Regression models and life tables;Cox;JI R. statist. Soc.,1972