00518naa#a2200181#i#450# EN\INFRA-M\bibl\2090 20240820231900.2 1998-1740 20140417b2014####ek#y0engy0150####ca RUS RU Challenges in Designing Pre-School Education Standard Journal article Moscow INFRA-M Academic Publishing LLC. 2014 7 с. Journal article local Mayer Aleksey Timofeeva Liliya L'vovna naukaru.ru