1. Normal fetal anatomy as visualized with gray scale ultrasonography;Filly,1980
2. Diagnosis of congenital fetal abnormalities by sonography;Santos-Ramos;Obstet. Gynecol.,1975
3. Ultrasound in the diagnosis of congenital anomalies;Hobbins;Am. J. Obstet. Gynecol.,1979
4. Problèmes posés par le dépistage in utero d’une petite hydronéphrose;Le Guern;J. Echographie Méd. Ultrason.,1982
5. Routine realtime ultrasound in a low risk obstetric population;Ott;J. Reprod. Med.,1980