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Subjects
Agriculture, Agriculture, history, Balance of nature, Bodennutzung, Bodenschutz, Bodenzerstorung, Civilization, Civilization, history, Degradation, History, Human ecology, Plant Ecology, Plant conservation, Plant ecology, Soil and civilization, Soil conservation, Soils, Wildlife conservationID Numbers
- OLID: OL157722A
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September 9, 2008 | Edited by RenameBot | fix author name |
April 1, 2008 | Created by an anonymous user | initial import |