00522naa#a2200169#i#4500001002200000005001700022011001400039100004100053101000800094102000700102200012300109210005100232215001000283608002700293700001700320856001500337EN\INFRA-M\bibl\1533320240514002939.2##a1998-1740##a20170222b2017####ek#y0engy0150####ca0#aRUS##aRU1#aAssessment of the Level of Abstractness of Material Statement of in Natural Sciences School TextbookseJournal article1#aMoscowcINFRA-M Academic Publishing LLC.d2017##a5 с.##aJournal article2local#1aMayergR. V.4#anaukaru.ru