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| 100 | _aKOTSCHI, Johannes | ||
| 245 | _aTowards Control of Desertification in African Drylands: Problems, Experiences, Guidelines | ||
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_aGermany _bGTZ _c1986 |
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| 300 | _a241 p. | ||
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_93851 _aDESERTIFICACION |
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