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The Mollusca of the estuarine region of the rivers Rhine, Meuse and Scheldt in relation to the hydrography of the area: 4. The genus Sphaerium
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Functional guilds of fishes and macrocrustaceans in the Westerschelde and Oosterschelde estuary
The demersal fish and macro-invertebrate assemblages of the Westerschelde and Oosterschelde estuaries: overview and final conclusions