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International business environmental barometer 1997
Belz, Frank (contributor); Strannegård, Lars (contributor) - 1997
Persistent link: https://www.econbiz.de/10001407308
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Nachhaltigkeits-Marketing in der Schweizer Baubranche
Belz, Frank (contributor); Sammer, Katharina (contributor);  … - 2003
Persistent link: https://www.econbiz.de/10001905431
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Nachhaltigkeits-Marketing : Grundlagen & Potenziale
Belz, Frank (contributor); Bilharz, Michael (contributor) - 2003
Persistent link: https://www.econbiz.de/10002715459