00509naa#a2200181#i#450# EN\\bibl\76953 20260223062349.1 1819-4036 20120425b2012####ek#y0engy0150####ca RUS RU PERIODIZATION ISSUES IN FOREIGN LANGUAGE TEACHING Journal article Krasnoyarsk Krasnoyarsk State Agrarian University 2012 0 с. Journal article local . 373(091) RUS Levchenko O Yu sej.kgau.ru