1. Early childbearing and subsequent fertility;Trussell;Family Planning Perspectives,1978
2. The relationship of maternal health, infant health, and socio-demographic factors to fertility;Bonham;Public Health Reports,1978
3. Population Pressure on Families, Family Size, and Childspacing;Wray,1971
4. Marriage, fertility, and childspacing;U.S. Bureau of the Census;Current Population Reports, Series p-20,1965
5. The second time around: birth spacing among teenage mothers;Darabi,1982