00539naa#a2200181#i#450# EN\\bibl\773 20240503134249.5 1993-7768 20131211b2013####ek#y0engy0150####ca RUS RU Methodological Approaches to Tourist Cluster Development Journal article CHERKIZOVO Russian State University of Tourism and Service 2013 9 с. Journal article local Morozova Lyubov Bolshakov Aleksey philosoph.editorum.ru