1. Recording ofbabies with Dowin's syndrome was continued until the end of 1991 The population increased from aboutt 250000 to over 300 000 during the 35 years The consultant obstetric unit Eand the chilanctora dren's department of Blackpool;N Hospital served all the
2. Committee on the Effects of Atomic Radiation. Report;United Nations Scientific,1982
3. Relationship between incidences of Down's syndrome or visible malformation and gonad dose equivalent rate of natural background radiation;Arch Environ Health,1985
4. Maternal radiation and chromosomal aberrations;Uchida, I.A.; Holunga, R.; Lawler, C.;Lancet,1968
5. Maternal diagnostic x-irradiation before conception and the frequency of mongolism in children subsequently born;Stevenson, A.C.; Mason, R.; Edwards, K.D.;Lancet,1970