1. Abortion in the United States,1958
2. Therapeutic abortions in New York City, 1943–1947;Tietze;Am. J. Obstet. Gynec.,1950
3. World trends of therapeutic abortion and sterilization;Greenhill;Clin. Obstet. Gynec.,1964
4. Legal abortion in Scandinavia;Tietze;Q. Rev. Surg. Obstet. Gynec.,1959
5. Medicinalstyrelsen,1961