00548naa#a2200169#i#4500001002200000005001700022011001400039100004100053101000800094102000700102200013400109210005100243215001000294608002700304700003200331856001500363EN\INFRA-M\bibl\1226920240713180935.6##a1998-0728##a20160617b2016####ek#y0engy0150####ca0#aRUS##aRU1#aDevelopment of Ideas of Math Education of Younger Schoolchildren in Soviet School in 30-50-ies of the XX CenturyeJournal article1#aMoscowcINFRA-M Academic Publishing LLC.d2016##a3 с.##aJournal article2local#1aKochurovagElena Eduardovna4#anaukaru.ru