01033cam a22002531 4500 sg 38000048 DLC 20260227112741.0 820128s1938 xx a 000 0 eng sg 38000048 (OCoLC)14753089 DLC DNLM ArU DLC RC602 .P43 W1 ME449 no.229 Penrose, L. S. (Lionel Sharples) A clinical and genetic study of 1280 cases of mental defect, by L. S. Penrose. London, H. M. Stationery off., 1938. 1 p. l., 159 p. ill. Medical Research Council (Great Britain) Special report series, no. 229 At head of title: ... Privy council. Medical research council. "List of references": p. 71-73; "List of publications from the Research department, Royal eastern counties' institution, Colchester": p. 74-75. Mental retardation Case studies. Mental defect, A clinical and genetic study of 1280 cases of 90293 90293