01105nas 2200313 450 991051370750332120240227192230.0(CKB)5470000001332246(NjHacI)995470000001332246(EXLCZ)99547000000133224620240221a19209999 uy engur|||||||||||txtrdacontentcrdamediacrrdacarrierStudies in mental inefficiency /National Association for Mental HealthLondon :National Association for Mental Health,1920.1 online resourceThe Definition and Diagnosis of Mental Deficiency. Part II -- The Lilian Greg Occupation Centre for Defective Children -- News and Notes -- Correspondence -- Reviews of Recent Books -- Errata.People with mental disabilitiesPeople with mental disabilities.362.3NjHacINjHaclJOURNAL9910513707503321Studies in Mental Inefficiency2565605UNINA