1. Center for International Forestry Research; P.O. Box 0113 BOCBD Bogor 16000 Indonesia
2. Dinas Kehutanan; Riau Province; Jl. Sudirman No.468 Pekanbaru 28126 Indonesia
3. Graduate School for International Development and Cooperation; Hiroshima University; Hiroshima 739-8529 Japan
4. Aldo Leopold Wilderness Research Institute; Rocky Mountain Research Station, USDA Forest Service; 790 E. Beckwith Ave. Missoula Montana 59802 USA