RT null T1 Monitoring of PFOS in Water – Asia-Pacific Region A2 Fiedler, Heidelore K1 persistent organic pollutant YR 2018 FD 2018 LK https://wedocs.unep.org/handle/20.500.11822/26165 UL https://wedocs.unep.org/handle/20.500.11822/26165 DS UN Environment Document Repository RD Sep 24, 2026