Protective development and conservation of the forest environment in Papua New Guinea : priority needs and measures proposed under the Tropical Forest Action Plan 1989 Srivastava, Prem | Bützler, Wilfried |
Natural resource systems analysis : ecological and socio-economic systems and sensitivity analysis for the conservation and management of forest ecosystems and natural resources in South-East Asia 1992 Bossel, Hartmut | Bruenig, E. F. |