1. Mechanism of transfer across the human placenta;Sibley,1992
2. Placental production and foetal utilization of lactate and pyruvate;Burd;Kature,1975
3. The origin and Circulation of the amniotic fluid;MacCarthy,1978
4. The human placenta;Boyd,1970
5. Early human placental morphology;Jauniaux,1992