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    Towards a Tigray regional environmental and economic strategy (TREES) a contribution to the Symposium on Combating Environmental Degradation in Tigray, Ethiopia

    Towards a Tigray regional environmental and economic strategy (TREES) a contribution to the Symposium on Combating Environmental Degradation in Tigray, Ethiopia von Hurni, Hans, Perich, Isabel

    Veröffentlicht 1992
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