1FAO.Global Forest Resources Assessment 2000[R].Italy Main Report FRA 2000, Forestry Paper 140, Rome, 2000a.
2ITTO. ITTO guide lines for the restoration, management and rehabilitation of degraded and secondary tropical forests draft prepa red on behalf of ITTO by an international expert panel held in Nern, Switzerland, 2002.18-22.
3February. UNEP, CBD, SBSsTA.Main Theme: Forest Biological Di- versity[R],Report of the Ad Hoc Technical Expert Group on Forest Biological Diversity.SBS TrA, Sev.2001.