By Töpfer Klaus   in GAIA - Ecological Perspectives for Science and Society

ISSN:0940-5550|16|1|8-9

oekom verlag‎(2007)‎

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By Postlep Rolf-Dieter   Schneidewind Uwe   Spoun Sascha   Töpfer Klaus   in GAIA - Ecological Perspectives for Science and Society

ISSN:0940-5550|20|4|275-276

oekom verlag‎(2011)‎

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