Ecological gradients in the Danube Delta lakes : present state and man-induced changes. -- Lelystad : Institute for Inland Water Management and Waste Water Treatment, [2000?]. -- 167 s. : far. obr., tab. ; 30 cm. -- ISBN 90-369-5309-X (brož.) : 8,20 €

1. Dunaj 2. Dunaj-delta (Rumunsko a Ukrajina) 3. správy

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