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UNEP-WCMC (2024). Protected Area Profile for LSG-Die Gebiete Kalbeck, Vorselaer, Grafendonk, Grotendonk, Berberheide, Schravelner Heide, Knappheide, Baalerbruch, Gocher Veen, Weezer Veen, Wember Veen, Hees, Laarbruch from the World Database on Protected Areas, May 2024. Available at: www.protectedplanet.net