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Nitrats Nitrates Aigua -- Contaminaci贸 -- Catalunya -- Osona Water -- Pollution -- Catalonia -- Osona Nitrats -- Aspectes ambientals Groundwater -- Pollution Nitrates -- Environmental aspects
Ministerio de Ciencia e Innovaci贸n (Espanya) Boy Roura, Merc猫 Menci贸 i Domingo, Anna Nolan, Bernard T. Mas-Pla, Josep