00505naa#a2200169#i#450# EN\\bibl\113112 20260320054148.5 2311-1402 20110625b2011####ek#y0engy0150####ca RUS RU Rekreatsionnye geograficheskie klastery i problemy ikh konkurentosposobnosti Journal article Nizhnevartovsk Nizhnevartovsk State University 2011 8 с. Journal article local Sokolov S N nvsu.editorum.ru