00523naa#a2200169#i#4500001001600000005001700016011001400033100004100047101000800088102000700096200010400103210005800207215001000265608002700275700003100302856002000333EN\\bibl\11308820260118010231.7##a2311-1402##a20120325b2012####ek#y0engy0150####ca0#aRUS##aRU1#aTheoretical basis for recreation and tourism studies at various hierarchial levelseJournal article1#aNizhnevartovskcNizhnevartovsk State Universityd2012##a5 с.##aJournal article2local#1aOboringMatvey Sergeevich 4#avestnik.nvsu.ru