00643naa#a2200181#i#450# EN\\bibl\16081 20240518220915.6 1999-5644 20170620b2017####ek#y0engy0150####ca RU Educational discourse: Concept «CORE HIGH SCHOOL SUBJECT» Journal article CHERKIZOVO Russian State University of Tourism and Service 2017 8 с. Journal article local Туристско-экскурсионное обслуживание. 71.37 grnti Pen'kov Boris Viktorovich Vasil'eva Svetlana Vladimirovna rguts.editorum.ru