1. Contribution of preterm delivery to perinatal mortality;Rush;Br Med J,1976
2. 1981–1985 maternal and child health data base: statistical appendix;Rust,1989
3. The applicability of labor inhibition to the problem of prematurity;Zlatnik;Am J Obstet Gynecol,1972
4. Detection of preterm labor by ambulatory monitoring of uterine activity: a preliminary report;Katz;Obstet Gynecol,1986
5. Evaluation of a preterm birth prevention program: preliminary report;Herron;Obstet Gynecol,1982