Klaus Töpfer
![Töpfer in 2003](https://upload.wikimedia.org/wikipedia/commons/1/17/UN.KlausTopfer.01.jpg)
1
Published: 2013.
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2
Published: [2021]
Superior document: Title is part of eBook package: De Gruyter DG Plus DeG Package 2021 Part 1
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3
Published: [2015]
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4
Published: [2014]
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5
Published: [2014]
Superior document: Title is part of eBook package: De Gruyter transcript Backlist eBook Package 2000-2013
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