TY - GEN AU - United Nations Environment Programme PY - 2021 UR - https://wedocs.unep.org/handle/20.500.11822/36740 LA - English KW - persistent organic pollutant TI - Bi‐ennial Global Interlaboratory Assessment on POPs – Round 4: Appendix IV. z-Scores assessment M3 - Communication or other resource ER -