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12. A Bucharest-district prevalence survey of low-grade mental deficiency among 7- to 15-year-old children. Christodorescu D, Retezeanu A, Bălăiţă C, Berbescu A, Sîrbu C, Ciupitu A. Neurol Psychiatr (Bucur); 1976 Jan; 14(4):311-8. PubMed ID: 139674 [No Abstract] [Full Text] [Related]
13. Letter: Autism and mental subnormality in Northern Ireland. MacKay DN, Elliott R, Calvert GJ. Lancet; 1973 Dec 22; 2(7843):1443-4. PubMed ID: 4128755 [No Abstract] [Full Text] [Related]
14. Admission of children to subnormality hospitals. Mackay DN, Crory L. Lancet; 1973 Jun 02; 1(7814):1250-1. PubMed ID: 4122598 [No Abstract] [Full Text] [Related]