TY - GEN AU - United Nations Environment Programme AU - Örebro University AU - Vrije Universiteit Amsterdam A4 - van der Veen, Ike A4 - Fiedler, Heidelore A4 - de Boer, Jacob PY - 2021 UR - https://wedocs.unep.org/handle/20.500.11822/30923 LA - English TI - Bi-ennial Global Interlaboratory Assessment on Persistent Organic Pollutants – Fourth Round 2018/2019 M3 - Communication or other resource ER -