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werner willi kleinhanss
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Auswirkungen steigender Energiepreise in der Landwirtschaft
Werner-Willi Kleinhanss · Landwirtschaftsverlag
328 sayfa · 1986
Agricultural productivity / Agriculture / Costs / Energy consumption
The implementation of nitrate policies in Europe
Floor Brouwer, Werner-Willi Kleinhanss · Wissenschaftsverlag Vauk
285 sayfa · 1997
Environmental policy / Agriculture / Agricultural pollution / Nitrates