1. Diagnostic Ultrasound Applied to Obstetrics and gynecology;Sabbagha,1994
2. Ultrasound in Obstetrics and Gynecology;Chervenak,1993
3. The anomalous fetus;Manning,1995
4. Diagnostic Ultrasound;McGahan,1994
5. Ultrasonography in Obstetrics and Gynecology;Callen,1994