Forests and forestry Bibliography 5 Forest ecology 5 Forest management 4 History 4 Economic aspects 3 Forest policy 3 Máis ... Remote sensing 3 Trees 3 Congresses 2 Deforestation 2 Geology 2 Multiple use 2 Taxation 2 Woodlots 2 Biomass energy 1 Clearing of land 1 Data processing 1 Dissertations, Academic 1 Documentation 1 Effect of human beings on 1 Farms 1 Forest products 1 Forest products industry 1 Forest soils 1 Forest surveys 1 Fuelwood 1 Gmelina arborea 1 Government ownership 1 Historical geography 1 menos ...