Gregersen, H. M., & Contreras, A. H. (1979). Forestry for local community development. Food and Agriculture Organization of the United Nations.
Tohutoru Kātū ChicagoGregersen, H. M., me Arnoldo H. Contreras. Forestry for Local Community Development. Rome: Food and Agriculture Organization of the United Nations, 1979.
Tohutoro MLAGregersen, H. M., me Arnoldo H. Contreras. Forestry for Local Community Development. Food and Agriculture Organization of the United Nations, 1979.
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