Literaturrecherche

Literatur Schleef K-H (1997) Impacts of the nitrate directive for Germany. Landwirtsch Umwelt 14:221-234

Literatur Schleef K-H, Kleinhanß W (1997) Nitrogen balances at regional level in the EU. Landwirtsch Umwelt 14:61-78

Literatur Becker H, Kleinhanß W (1997) Assessment of CAP reform and fertilizer levies at regional level in the European Union. Landwirtsch Umwelt 14:193-206