Around the world, there is mounting evidence that parks and protected areas contribute to a healthy civil society, thus increasing the economic importance of cultural and nature-based tourism. Operating at the intersection of business and the environment, tourism can improve human health and wellbeing as well as serve as a catalyst for increasing appreciation and stewardship of the natural world. While the revenues from nature-based activities help to make the case for investing in park and protected area management; the impacts they have need to be carefully managed, so that visitors do not destroy the natural wonders that attracted them to a destination in the first place. This book features contributions from tourism and recreation researchers and practitioners exploring the relationship between tourism, hospitality, protected areas, livelihoods and both physical and emotional human wellbeing. The book includes sections focused on theory, policy and practice, and case studies, to inform and guide industry decisions to address real-world problems and proactively plan for a sustainable and healthy future.

Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis· seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) *at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac· tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 20 (thesis year 1975) a total of 10,374 theses titles from 28 Canadian and 239 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. The organization of Volume 20 is identical to that of past years. It consists of theses titles arranged by discipline and by university within each discipline.

Zoos are important and popular tourist attractions. Spread around the world, they are typically located in major cities, with visitation levels comparable to other major attractions. Nature-based attractions constructed in artificial settings, they face the challenge of trying to balance potentially conflicting aims of conservation, education and entertainment. The best are continually developing fresh and effective techniques on visitor interpretation and management, the worst highlight the manipulation of animals for human gratification. Taking a global approach, this book examines the problems and paradoxes of zoos as they try to balance their roles as visitor attractions while repositioning themselves as leading conservation agencies. "This book provides a detailed and critical examination of the conflicting roles and identities of the modern zoo from a tourism perspective and as such reminds us that zoos are as much about the people who visit them as about the animals that they display. At a time when they are under continual critical scrutiny, this book delivers a fresh approach to our understanding and appreciation of zoos and of the challenges and opportunities that they face as they strive to remain relevant within modern society." Andrew Tribe, University of Queensland, Australia