1. The Principle and the Practice of Ultrasonography in Obstetrics and Gynecology;Fleischer,1991
2. Transvaginal Sonography;Timor-Tritsch,1991
3. Endovaginal Sonography;Goldstein,1991
4. Diagnostic Ultrasound Applied to Obstetrics and Gynecology;Sabbagha,1994
5. Ultrasound in Obstetrics and Gynecology;Chervenak,1993