Prop. HC/CA
Campbell S., Thoms Alison. "Ultrasound Measurements of the Fetal Head to Abdomen Circumference Ratio
in the Assessment of Growth Retardation," British Journal of Obstetrics and Gynaecology, 84: (Marzo 1977),
165-174.
Referencias generales
Volumen (Vol)
Beyer, W.H. Standard Mathematical Tables, 28th ed., CRC Press, Boca Raton, FL, (1987), 131.
Referencias
6-13