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Testing criteria and indicators for the sustainable management of forests: phase 1 final report
(Center for International Forestry Research, Jakarta (Indonesia) European Union, Brusells (Bélgica) GTZ, Estocolmo (Suecia) AID, Washington, DC (EUA), 1996)
Nutrient balance studies to determine the sustainability of management systems of natural and plantation forests in Costa Rica
(CATIE, Turrialba (Costa Rica). Atlantic Zone Programme Agricultural University Wageningen, Wageningen (Países Bajos) Ministerio de Agricultura y Ganadería, San José (Costa Rica), 1994)