1. Chapalain M (1978) Perinatality: French cost-benefit studies and decisions on handicap and prevention. In: Major mental handicaps: methods and costs of prevention, no 59. Ciba Foundation Symposium. Elzevier, Amsterdam, pp 193–204.
2. David R, Siegel E (1983) Decline in neonatal mortality, 1968 to 1977. Better babies or better care? Pediatrics 71: 531–540.
3. Goujon H, Papiernik E, Maine D (1985) The prevention of preterm delivery through prenatal care: an intervention study in Martinique. Int J Gynaecol Obstet 23: 427–433.
4. Herron MA, Katz M, Creasy RK (1982) Evaluation of a preterm birth prevention program: preliminary report. Obstet Gynecol 23: 427–433.
5. Kessel SS, Villar J, Berendes HW, Nugent RP (1984) The channing pattern of low birth weight in the United States. JAMA 251: 1978–1984.