00605naa#a2200169#i#450# EN\INFRA-M\bibl\84783 20250111081218.6 2500-3305 20240425b2024####ek#y0engy0150####ca RU Methodology for the formation of elementary quantitative concepts in preschoolers with intellectual disabilities Journal article Moscow INFRA-M Academic Publishing LLC. 2024 14 с. Journal article local умственно отсталых, слаборазвитых. 376.42 Chumakova I. V. zh-szf.ru