title: [Age and intra-age differences in the "school maturity" of 5.5-7-year-old children in the town of Brezhnev].
mesh_terms: D000367:Age Factors; D002648:Child; D002657:Child Development; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D012737:Sex Factors
vernacular_title: Vozrastnye i vnutrivozrastnye razlichiia "shkol'noĭ zrelosti" deteĭ 5.5-7 let g. Brezhneva.