Testing Criteria and Indicators of Sustainable Management of Plantation Forests at PT Arara Abadi (Indah Kiat group of companies), Riau Province, Sumatera, Indonesia - Purnadjaja; Tan Kee Chong; Manurung, E.G.T.; Supriyo, H.; Makinuddin; Widyastuti, S.M.; Sutarahardaja, S. (Center for International Forestry Research, 1998)