1. Diagnostic ultrasound imaging in pregnancy;National lnstitutes of Health;Conn Med,1984
2. The effects of embryonic and fetal exposure to x-ray, microwaves, and ultrasound;Brent;Clin. Obstet. Gynecol.,1983
3. Revelations: A summary and analysis of the N1H Consensus Development Conference on Ultrasound Imaging in Pregnancy;Shearer;Birth,1984
4. National Institute of Health Consensus Development Conference Consensus Statement.diagostic ultrasonic imaging in pregnancy.U.S. Government Printing Office. Vol. 5, No.1.
5. Ultrasound: Its benefits and risks;Caldwell;American Baby,1984