Kakadu national park : conflicts in a world heritage area / Derrin Davis, Betty Weiler
Ecotour guide training in less developed countries: some preliminary research findings / Rosemary Black, Sam Ham, Betty Weiler
Getting the message across: an analysis of messages delivered by tour operators in protected areas / E. Kate Armstrong, Betty Weiler
A review and evaluation of China's quality assurance system for tour guiding / Songshan Huang, Betty Weiler