Bawden, J.W. , Wolkoff, A.S., and Flowers, C.E., JR. Placental Transfer of F18 in Sheep , J. dent. Res., 43:678-83, 1964.
2.
Quimby, E.H., Feitleberg, S., and Silver, S.Radioactive Istopes in Clinical Practice, pp. 32-33. Philadelphia : Lea and Febiger, 1958.
3.
McCLURE Browne, J.C., and Veall, N.The Maternal Placental Blood Flow in Normotensive and Hypertensive Women, J. Obstet. Gynaec. Brit. Emp., 60:141- 47, 1953.
4.
Barcroft, J.Researches on Pre-natal Life, pp. 67-75. Springfield, Ill.: Charles C Thomas, 1947.
5.
Krantz, V.E. , Panos, T.C., and Evans, J.Physiology of Maternal-Fetal Relationship through the Extra-corporeal Circulation of the Human Placenta, Amer. J. Obstet. Gynec., 83 :1214-28, 1962.
6.
Cooper, K.E. , Greenfield, A.D., and Huggett, A. St. G.The Umbilical Blood Flow in the Fetal Sheep, J. Physiol., 108:160-66, 1949.
7.
Feltman, R., and Kosel, G.Prenatal and Postnatal Ingestion of Fluorides: Fourteen Years of Investigation, Final Report, J. dent. Med., 16:190-98, 1961.