RT null T1 HELCOM Core indicators as the base of the HELCOM Assessment System-L.Avellan A1 Baltic Marine Environment Protection Commission, YR 2014 FD 2014 LK https://wedocs.unep.org/handle/20.500.11822/11075 UL https://wedocs.unep.org/handle/20.500.11822/11075 NO Presentation at the Technical Workshop on Selecting Indicators for the State of Regional Seas NO https://www.unep.org/regionalseas/ DS UN Environment Document Repository RD Sep 16, 2026