Outdoor recreation 13 Tourism 7 Tourism and Travel 6 Leisure 4 Leisure, Recreation and Tourism Economics, (New March 2000) 4 Case studies 3 Management 3 Natural Resource Economics, (New March 2000) 3 Social Psychology and Social Anthropology, (New March 2000) 3 Sport and Recreational Activities, (New March 2000) 3 Coasts 2 Ecotourism 2 Environmental impact 2 Hiking 2 Land Resources 2 Man 2 Mountain areas 2 Parks 2 Planning 2 Policy and Planning 2 Recreation and state 2 Recreational Facilities and Management, (New March 2000) 2 Sustainability 2 Adventure travel 1 Amenity and recreation areas 1 Amenity migration 1 Arts 1 Bicycling 1 Biological Resources (General) 1 Boating 1