TY JOUR TI ECOLOGICAL MONITORING OF ENVIRONMENTAL POLLUTION BY FORMALDEHYDE AND BENZ(A)PYRENE KW ecological monitoring KW environment KW food security KW pollution KW formaldehyde KW benz(a)pyrene JO Bulletin of KSAU AU Demidenko, G.A. AU Zhirnova, D.F. PY 2013 IS PB Krasnoyarsk State Agrarian University