Population 379 Population studies (Demography) 185 Demography 135 Birth control 73 Economics 68 Agriculture 65 Ecology 63 Sociology 62 India 60 History 59 Population biology 59 Population genetics 59 Education 51 Population growth 45 Genetics 44 Hygiene 43 Population policy 42 population 42 Rural development 41 Politics and government 40 Urbanization 39 Finance 38 Industries 38 Scheduled tribes 38 Tribes 37 Wildlife management 37 Communication 36 Language and literature 36 Non-governmental organizations 36 Tourist trade 36