Farming without harming : the impact of agricultural pollution on water systems : proceedings
Meeting "Farming without Harming", 7-8 October 1998, Norwegian Institute for Water Research, NIVA, Oslo, Norway ; EURAQUA - European Network of Freshwater Research Organisations Inglês
Oslo : Norwegian Institute for Water Research : EURAQUA - European Network of Freshwater Research Organisations : 1999,
231 p. : il.; 24 cm