[Reasons for cases of deficient school maturity in children entering school].
D002648:Child; D002657:Child Development / Q000502:physiology*; D005191:Family Characteristics; D006801:Humans; D009017:Morbidity; D012572:School Health Services; D012959:Socioeconomic Factors; D014586:USSR
Prichiny sluchaev nedostatochnoĭ shkol'noĭ zrelosti deteĭ, postupaiushchikh v shkolu.