Maps 373 History 55 Periodicals 52 Case studies 30 Social life and customs 30 Politics and government 27 Statistics 25 more ... Geology 24 Congresses 23 Economic conditions 22 Research 22 Ethnology 20 Forests and forestry 19 Social conditions 19 Botany 17 Agriculture 16 Tourism 16 National parks and reserves 14 Natural history 14 Economic aspects 13 Identification 13 Description and travel 12 Dusun (Bornean people) 12 Fisheries 12 Mines and mineral resources 12 Bajau (Southeast Asian people) 10 Social aspects 10 Timber 10 Folklore 9 Nature conservation 9 less ...