RT null T1 Guidelines for the identification of PCBs and materials containing PCBs A1 United Nations Environment Programme, K1 chemical PB United Nations Environment Programme YR 1999 FD 1999 LK https://wedocs.unep.org/handle/20.500.11822/8221 UL https://wedocs.unep.org/handle/20.500.11822/8221 NO This document is about Identification of PCBs and Materials Containing PCBs. DS UN Environment Document Repository RD Sep 17, 2026