RT null T1 Reducing Meercury use in artisanal small-scale gold mining A1 United Nations Environment Programme, YR 2016 FD 2016 LK https://wedocs.unep.org/handle/20.500.11822/12186 UL https://wedocs.unep.org/handle/20.500.11822/12186 DS UN Environment Document Repository RD Sep 22, 2026