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Wadden Sea Ecosystem 11: Contaminants in Bird Eggs in the Wadden Sea

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Harbour Seal Numbers in the Wadden Sea and on Helgoland in 2000

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Wadden Sea Ecosystems 10: Breeding Birds in the Wadden Sea in 1996

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Harbour Seal Numbers in the Wadden Sea and on Helgoland in 1999

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Agreement on the Conservation of Seals in the Wadden Sea (WSSA)

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