1. The Impact of Tourism and Recreation on the Environment. A Miscellany of Readings,1985
2. Ecology Recreation and Tourism;Edington,1986
3. Tourism and environmental conservation. Conflict, coexistence or symbiosis?;Budowski;Environmental Conservation,1976
4. Mass tourism and the natural environment: problems, conclusions, attempted counteractions;Krol;Problemy Turystyki,1986