Mental retardation, prenatal diagnosis and infant assessment : proceedings of Symposia 6 and 8 held at the Middlesex Medical School on 19 June 1970 and 26 March 1971 under the auspices of the Institut. ISBN 0407268502. Published by Butterworths for the Institute for Research into Mental Retardation in 1972. Publication and catalogue information, links to buy online and reader comments.