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1by von Arx, Georg, Carrer, Marco, Crivellaro, Alan, De Micco, Veronica, Fonti, Patrick, Lens, Frederic, Prendin, Angela Luisa, Rosner, Sabine, Sass-Klaassen, UteArticle/Letter to editor bibliotecaWUR NL
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2by Petit, Giai, von Arx, Georg, Kiorapostolou, Natasa, Lechthaler, Silvia, Prendin, Angela Luisa, Anfodillo, Tommaso, Caldeira, Maria C., Cochard, Hervé, Copini, Paul, Crivellaro, Alan, Delzon, Sylvain, Gebauer, Roman, Gričar, Jožica, Grönholm, Leila, Hölttä, Teemu, Jyske, Tuula, Lavrič, Martina, Lintunen, Anna, Lobo-do-Vale, Raquel, Peltoniemi, Mikko, Peters, Richard L., Robert, Elisabeth M.R., Roig Juan, Sílvia, Senfeldr, Martin, Steppe, Kathy, Urban, Josef, Van Camp, Janne, Sterck, FrankArticle/Letter to editor bibliotecaWUR NL