00506naa#a2200169#i#450# EN\INFRA-M\bibl\12270 20241203044706.2 1998-0728 20160617b2016####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 3 с. Journal article local Pisareva L. zh-szf.ru