National parks 11 National parks and reserves 5 Tourism 5 Wildlife conservation 5 Land Resources 4 Natural Resource Economics, (New March 2000) 4 Tourism and Travel 4 Economic development 3 Leisure, Recreation and Tourism Economics, (New March 2000) 3 Nature conservation 3 Nature tourism 3 Sanctuaries 3 Tiger 3 Wildlife refuges 3 Biodiversity 2 Biodiversity conservation 2 Botany 2 Bryophytes 2 Case studies 2 Conservation 2 Conservation areas 2 Conservation of natural resources 2 Ecotourism 2 Endangered species 2 Environmental management 2 Folklore 2 Forestry 2 Government policy 2 National parks and reserves-Government policy-History 2 Natural resources 2