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2. Perinatal infections by group B beta haemolytic streptococcus;Becroft;Br J Obstet Gynaecol,1976
3. Trends and status of gonorrhoea in the United States;Brown;J Infect Dis,1971
4. Premature spontaneous rupture of membranes;Burchell;Am J Obstet Gynecol,1964
5. The management of premature rupture of the membranes;Fayez;Obstet Gynecol,1978