PLASMA OESTRIOL AND HUMAN PLACENTAL LACTOGEN MEASUREMENTS IN PATIENTS WITH HIGH RISK PREGNANCIES - Edwards, R. P.; Diver, M. J.; Davis, J. C.; Hipkin, L. J. (Blackwell Publishing Ltd, 1976)
http://dx.doi.org/10.1111/j.1471-0528.1976.tb00815.x
Keywords: WW-YZ