Tribes 346 History 233 India 132 Scheduled tribes 118 Pure sciences 104 Politics and government 97 Trees 97 Education 90 Philosophy 89 Agriculture 87 Sociology 78 Mathematics 75 Social conditions 71 Agronomy 70 Social Sciences 64 Ethnology 56 Economic conditions 55 Rural development 54 Caste 50 Literature 48 Women 48 Social aspects 45 Forests and Forest Trees (Biology and Ecology) 44 Untouchables 43 Finance 42 Population 42 Pure sciences - Dictionaries & encyclopedias 42 Novel 41 Plant Biotechnology 41 Communication 40