By von Hauff Michael   Kleine Alexandro   in GAIA - Ecological Perspectives for Science and Society

ISSN:0940-5550|18|1|29-31

oekom verlag‎(2009)‎

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By Hauff Michael Von   Kleine Alexandro   in International Journal of Environment and Sustainable Development

ISSN:1474-6778|5|4|372-394

Inderscience Publishers‎(2006)‎

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