RT null T1 Bi-ennial Global Interlaboratory Assessment on POPs – Round 4: Appendix V. Statistical Evaluation A1 United Nations Environment Programme, K1 persistent organic pollutant YR 2021 FD 2021 LK https://wedocs.unep.org/handle/20.500.11822/36785 UL https://wedocs.unep.org/handle/20.500.11822/36785 NO Appendix V. Statistical Evaluation DS UN Environment Document Repository RD Sep 23, 2026