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Zentralblatt Fur Gynakologie|January 1, 1977
[Intrauterine contraceptive devices (IUD'S) (author's transl)]H LehfeldtEuropean Journal of Obstetrics, Gynecology, and Reproductive Biology|May 1, 1984
Immediate postabortion insertion of an IUDH LehfeldtContraception|October 1, 1984
Use effectiveness of the Prentif cervical cap in private practice: a prospective studyH Lehfeldt, I SivinPageof 1