TY - GEN AU - Guyana PY - 2016 UR - https://wedocs.unep.org/handle/20.500.11822/26965 LA - English KW - ozone KW - ozone-depleting substance KW - ozone layer TI - Ozone Day 2016 - Art, Poetry & Essay Writing Competition for Secondary Schools in Guyana M3 - Communication or other resource ER -