00507naa#a2200169#i#450# EN\INFRA-M\bibl\13074 20241016165549.3 1998-0728 20160817b2016####ek#y0engy0150####ca RUS RU Factors of Development of Primary Education and Their Measurement Methods in the West Journal article Moscow INFRA-M Academic Publishing LLC. 2016 8 с. Journal article local Pisareva L. naukaru.ru