00475naa#a2200169#i#4500001002100000005001700021011001400038100004100052101000800093102000700101200007500108210005100183215001000234608002700244700002000271856001400291EN\INFRA-M\bibl\290620241128204801.4##a1998-0728##a20140617b2014####ek#y0engy0150####ca0#aRUS##aRU1#aHow to Deal with Primary Sources at Elementary SchooleJournal article1#aMoscowcINFRA-M Academic Publishing LLC.d2014##a3 с.##aJournal article2local#1aSolovevgYakov 4#azh-szf.ru