00681naa#a2200193#i#450# EN\\bibl\19858 20240504102311.6 1995-042X 20180123b2018####ek#y0engy0150####ca RUS RU INTERREGIONAL SECTORAL COOPERATION OF PSKOV REGION: CLUSTER APPROACH Journal article CHERKIZOVO Russian State University of Tourism and Service 2018 13 с. Journal article local Туристско-экскурсионное обслуживание. 71.37 grnti MAHOTAEVA Marina Yur'evna BAKUMENKO Ol'ga Arkad'evna service-rusjournal.editorum.ru