%0 Journal Article %T Low second trimester maternal serum unconjugated oestriol in pregnancies with Down's syndrome %A CANICK, J. A. %A KNIGHT, G. J. %A PALOMAK1, G. E. %A HADDOW, J. E. %A CUCKLE, H. S. %A WALD, N. J. %J BJOG : An International Journal of Obstetrics & Gynaecology %V 95 %N 4 %P 330-333 %@ 1470-0328 %D 1988-04-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve