00520naa#a2200169#i#4500001001600000005001700016011001400033100004100047101000800088102000700096200010100103210005800204215001000262608002700272700003100299856002000330EN\\bibl\11308420260118201154.7##a2311-1402##a20120325b2012####ek#y0engy0150####ca0#aRUS##aRU1#aSystem approach in implementation of environmental and geoecological activitieseJournal article1#aNizhnevartovskcNizhnevartovsk State Universityd2012##a4 с.##aJournal article2local#1aOboringMatvey Sergeevich 4#avestnik.nvsu.ru