Number of items: 1.
Monograph
    Koivusalo, H., Varis, O. & Somlyody, L.
  
(1992).
    Water Quality of Nitra River, Slovakia - Analysis of Organic Material Pollution.
  
    IIASA Working Paper.
  IIASA, Laxenburg, Austria: WP-92-084
  
  
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