00503naa#a2200169#i#450# EN\INFRA-M\bibl\802 20251223004136.2 1998-0728 20131121b2013####ek#y0engy0150####ca RUS RU Local history component in teaching mathematics to primary schoolchildren Journal article Moscow INFRA-M Academic Publishing LLC. 2013 4 с. Journal article local Chiranova Olga Ivanovna zh-szf.ru