Case studies Tourism and Travel 22 Leisure, Recreation and Tourism Economics, (New March 2000) 16 Natural Resource Economics, (New March 2000) 15 Management 13 Social Psychology and Social Anthropology, (New March 2000) 12 Sustainability 12 Tourism 12 United States 11 Ecotourism 9 Policy and Planning 9 Tourism development 9 Environmental impact 8 Land Resources 8 India 7 Nature conservation 7 Agricultural Economics 6 Biological Resources (General) 6 Community development 6 Education 6 Marketing 6 Marketing and Distribution 6 Planning 6 Pollution and Degradation 6 Community Participation and Development, (New March 2000) 5 Destinations 5 Economic impact 5 Forests and Forest Trees (Biology and Ecology) 5 Resource management 5 Rural development 5