RT null T1 Federal Department of Environment Switzerland K1 mercury YR 2009 FD 2009-07 LK https://wedocs.unep.org/handle/20.500.11822/12493 UL https://wedocs.unep.org/handle/20.500.11822/12493 NO Federal Department of Environment Switzerland NO https://www.unep.org/chemicalsandwaste/Portals/9/Mercury/Documents/PartneshipsAreas/PartneshipsLetters/Switzerland.pdf DS UN Environment Document Repository RD Sep 16, 2026