00517naa#a2200169#i#4500001001600000005001700016011001400033100004100047101000800088102000700096200009100103210005800194215001000252608002700262700003800289856002000327EN\\bibl\11308620260119034204.1##a2311-1402##a20120325b2012####ek#y0engy0150####ca0#aRUS##aRU1#aField tourist camps and hiking tours organization safety requirementseJournal article1#aNizhnevartovskcNizhnevartovsk State Universityd2012##a6 с.##aJournal article2local#1aTretyakovgAlexander Vasilyevich 4#avestnik.nvsu.ru