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Successful environmental policy : a critical evaluation of 24 cases
Jänicke, Martin (contributor); Weidner, Helmut (contributor) - 1995
Persistent link: https://www.econbiz.de/10000903605
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Umwelt-Information : Berichterstattung und Informationssysteme in zwölf Ländern
Weidner, Helmut (contributor); Zieschank, Roland (ed.);  … - 1992
Persistent link: https://www.econbiz.de/10014271443