00461naa#a2200169#i#450# EN\INFRA-M\bibl\4675 20250114010124.2 1998-0728 20141217b2014####ek#y0engy0150####ca RUS RU School Life Problems of a First Grader Journal article Moscow INFRA-M Academic Publishing LLC. 2014 2 с. Journal article local Safonova Irina zh-szf.ru