1. An Atlas of Fetal Heart Rate Patterns;Hon,1968
2. Clinical fetal monitoring;Paul;Obstet. Gynecol.,1971
3. Clinical experiences with fetal heart rate monitoring of 1000 patients in labor;Shenker;Am. J. obstet. Gynecol.,1973
4. Experiences with fetal monitoring in a community hospital;Kelly;Obstet. Gynecol.,1973
5. Research on Prenatal Life;Bancroft,1947