1. Data from Obstetrical Statistical Cooperative;Kohl;Personal communication,1976
2. Gynecologic illness after sterilization;Muldoon;Br Med J,1972
3. Female sterilization. II. A comparison of methods;Laros;Obstet Gynecol,1975
4. Sexual sterilization by elective hysterectomy;Hibbard;Am J Obstet Gynecol,1972
5. Tubal sterilization. Morbidity on a charity hospital service;Mabray;Obstet Gynecol,1970