TY - BOOK AU - Clarke, A. D. B. (Alan Douglas Benson) AU - Lewis, Morris Michael AU - Institute for Research into Mental and Multiple Handicap TI - Learning, speech and thought in the mentally retarded : 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 PB - Butterworths for the Institute for Research into Mental Retardation PY - 1972 EP - vii, 83 p. UR - https://ci.nii.ac.jp/ncid/BA13602305 SN - 0407249508 ER -

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