Tribes 346 History 153 Scheduled tribes 118 India 107 Trees 97 Education 67 Politics and government 65 Social conditions 59 Sociology 53 Agriculture 51 Rural development 51 Philosophy 46 Economic conditions 44 Forests and Forest Trees (Biology and Ecology) 44 Social Sciences 42 Non-governmental organizations 41 Untouchables 40 Communication 39 Population 39 Tribes-India 39 Finance 37 Industries 37 Plants 37 Scheduled tribes in India 37 Wildlife management 37 Language and literature 36 Transportation 36 Tourist trade 35 Urbanization 35 Forests 33