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Ökologischer Landbau in Europa : Perspektiven und Entwicklungen
Meredith, Stephen (ed.); Willer, Helga (ed.);  … - 2014
Persistent link: https://www.econbiz.de/10010410953
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The world of organic agriculture : statistics and emerging trends 2020
Willer, Helga (ed.); Schlatter, Bernhard (ed.);  … - Forschungsinstitut für Biologischen Landbau - 2020
Persistent link: https://www.econbiz.de/10012299235