1. The IUD still has an important place in family planning;Chi;IPPF Medical Bulletin,1986
2. Evaluation of intrauterine devices: ninth progress report of the Cooperative Statistical Program;Tietze;Stud Fam Plann,1970
3. Intra-uterine devices: physiological and clinical aspects;World Health Organization;WHO Tech Rep Ser,1968
4. Report on intrauterine contraceptive devices;Advisory Committee on Obstetrics and Gynecology,1968
5. The intrauterine device;American College of Obsteticians and Gynecologists;ACOG Tech Bull No. 10,1968