00506naa#a2200169#i#450# EN\\bibl\113076 20260320204206.5 2311-1402 20120325b2012####ek#y0engy0150####ca RUS RU Economic and geographical position of Nizhnevartovsk region Journal article Nizhnevartovsk Nizhnevartovsk State University 2012 10 с. Journal article local Sokolov Sergey Nikolaevich filvestnik.nvsu.ru