25.		Practical environmental policies in travel and tourism-part I : the hotel sector / Victor T.C. Middleton, Rebecca Hawkins Autor: Middleton, Victor T.C. Coautor: ; Hawkins, Rebecca
26.		Encontro Nacional de Ambiente, Turismo e Cultura, Lisboa, 1-4 Nov. 1989 / org. Centro Nacional de Cultura Data Publicação: 1989 Col.autor: Encontro Nacional de Ambiente Turismo e Cultura. 1989
27.		Pratical environmental policies in travel and tourism-part II : airlines, tour operators and destinations / Victor Middleton T.C., Rebecca Hawkins Autor: Middleton, Victor T.C. Coautor: ; Hawkins, Rebecca
28.		Sustainable tourism for europe's protected areas : guidelines and ways forward / Rosie Simpson Autor: Simpson, Rosie
29.		The environmental know how fund and conservation through sustainable development / Kevin M. Heynes Autor: Heynes, Kevin M.
30.		Ecotourism in the Danube Delta / Derek R. Hall Autor: Hall, Derek R.
31.		Low impact eco-tourism - clarion call or reality? : the challenge of Botswana / Sjaak S.A. Smeding Autor: Smeding, Sjaak S.A
32.		Sustainable tourism development in Wales : from theory to practice / R. Elwyn Owen, Stephen F. Witt, Susan Gammon Autor: Owen, R. Elwyn Coautor: ; Witt, Stephen F Gammon, Susan
33.		Tourism planning, people and the environment in western Autralia / Ross K. Dowling Autor: Dowling, Ross K.
34.		An integrated approach to resort development : six case studies / Edward Inskeep and Mark Kallenberger Autor: Inskeep, Edward Data Publicação: 1992 Coautor: Kallenberger, Mark
35.		Le tourisme en Méditerranée : l'enjeu du dévelopement durable pour une destination majeure fragile / Francesco Frangialli Autor: Frangialli, Francesco
36.		Some fundamental truths about tourism : understanding tourism's social and environmental impacts / Bob Mckercher Autor: Mckercher, Bob