Valenta, P ; Nurnberg, H.W ; Klahre, P... Valenta , P , Nurnberg , H W , Klahre , P , Ruetzel , H , Merks , A G A & Reddy , S J 1983 , ' Comparative study of toxic trace metals in the estuaries of the Ooster- and Wester Scheldt and of the Sierra Leone River ' , Mahasagar , vol. 16 , no. 2 , pp. 109-126 ..
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1983