Learning, speech and thought in the mentally retarded; edited by A. D. B. Clarke and M. M. Lewis. Proceedings of Symposia 4 and 5 held at the Middlesex Hospital Medical School on 31 October 1969 and 20 March 1970 under the auspices of the Institute for Research into Mental Retardation, London.
Publisher:
Butterworths for the Institute for Research into Mental Retardation,
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