1. Simultaneous Intra- and Extrauterine Pregnancies;Reeves;Report of a Case. Obst. & Gynec.,1954
2. Bilateral Tubal Pregnancy;Williams;Am J. Obst. & Gynec.,1957
3. Unilateral Twin Ectopic Pregnancy;Lash;Am. J. Obst. & Gynec.,1942
4. Gynecologic and Obstetric Pathology;Novak,1952
5. Teratomatous Chorionepithelioma of the Ovary;Sturley;Minnesota Med.,1942