TY JOUR TI STUDYING ATMOSPHERIC AIR CONDITION OF THE WILDLIFE PRESERVE «RUSSIAN WOOD» OF STAVROPOL BY LICHEN INDICATION METHOD KW lichens KW cover KW wildlife preserve KW atmospheric air KW pollution JO Bulletin of KSAU AU Zelenskaya, T.G. AU Eremenko, R.S. AU Stepanenko, E.E. PY 2012 IS PB Krasnoyarsk State Agrarian University