1. A study of complications in preterm deliveries after prolonged premature rupture of membranes;Christensen;Obstet Gynecol,1976
2. Conservative management of patients with premature rupture of fetal membranes;Graham;Obstet Gynecol,1982
3. Premature rupture of membranes;Garite;Curr Probl Obstet Gynecol,1984
4. Epidemiology of preterm delivery;Kaltreider;Clin Obstet Gynecol,1980
5. Factors associated with spontaneous pre-term birth;Fedrick;Br J Obstet Gynaecol,1976