00659naa#a2200193#i#450# EN\INFRA-M\bibl\28936 /en/manage/index 20250202081549.7 2306-1731 20190606b2019####ek#y0engy0150####ca RUS RU Quality Assessment of Professional Tourism Education in International Certification Systems Journal article Moscow INFRA-M Academic Publishing LLC. 2019 4 с. Journal article local Статистика. Демография. Социология. 31 RUS Efremceva T. N. test.editorum.ru /en/manage/index