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![Erosion, conservation and small-scale farming : [a selection of papers presented at the 6the International Soil Conservation Conference of the International Soil Conservation Organisation, ISCO held in Ethiopia and Kenya, 6-18 November 1989, and reviewed by a group of international experts]. Geographica Bernensia , International Soil Conservation Organisation [ISCO] , World Association of Soil and](https://bilder.buecher.de/produkte/27/27394/27394454z.jpg "Erosion, conservation and small-scale farming : [a selection of papers presented at the 6the International Soil Conservation Conference of the International Soil Conservation Organisation, ISCO held in Ethiopia and Kenya, 6-18 November 1989, and reviewed by a group of international experts]. Geographica Bernensia , International Soil Conservation Organisation [ISCO] , World Association of Soil and")
Erosion, conservation and small-scale farming : [a selection of papers presented at the 6the International Soil Conservation Conference of the International Soil Conservation Organisation, ISCO held in Ethiopia and Kenya, 6-18 November 1989, and reviewed by a group of international experts]. Geographica Bernensia , International Soil Conservation Organisation [ISCO] , World Association of Soil and
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