Baltic agriculture in transition - the contribution to nutrient loads in the Gulf of Riga drainage basinVagstad, Nils; Deelstra, Johannes; Jansons, Viesturs; Loigu, EnnAgricultural effects on ground and surface waters : research at the edge of science and society2002 / p. 367-372

Overview of water quality problems in Estonia with the focus on drained peat areas as a source of nitrogenVassiljev, Anatoli; Blinova, IrinaUnderstanding Freshwater Quality Problems in a Changing World : [proceedings]2013 / p. 69-76  : ill