Maps 294 Digital 46 Case studies 33 Periodicals 33 History 19 Economic aspects 17 Agriculture 16 more ... Economic conditions 13 Forests and forestry 10 National parks and reserves 10 Politics and government 10 Soils 10 Ecotourism 9 Geology 8 Regional planning 8 Statistics 8 Social conditions 7 Environmental aspects 6 Indigenous peoples 6 Mines and mineral resources 6 Tourism 6 Agricultural extension work 5 Breeding 5 Description and travel 5 Economic policy 5 Forest reserves 5 Forest surveys 5 Geological research 5 Plant diversity 5 Research 5 less ...