1. Ectopic pregnancy;Bobrow;Obstet Gynecol,1962
2. Diagnosis and management of ectopic pregnancy;Campbell;Am J Obstet Gynecol,1952
3. Extra-uterine pregnancy;Fielding;Obstet Gynecol,1965
4. Ectopic pregnancy;Nelson;Postgrad Med,1960
5. Ectopic pregnancy;Priddle;Am J Obstet Gynecol,1952