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by: UNEP and GRID Arendal (Norway), 2016
by: Stichting De Noordzee (the Netherlands), 2016
by: Thomas Mani, Armin Hauk, Ulrich Walter & Patricia Burkhardt-Holm, 2015
by: H.A. Leslie, S.H. Brandsma, M.J.M. van Velzen, A.D. Vethaak (Netherlands), 2018