Mathieson, Alister
Tourism : economic, physical and social impacts
Longman, 1995
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Page, Stephen J.
Urban tourism / Stephen Page
Royutledge, 1995
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Elliot, James
Tourism
Routledge, 1997
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Tourism
Longman, 1999
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Nature tourism : managing for the environment
edited by Tensie Whelan; foreword by Peter A. A. Berle
New York : Uslan Press, 1991,
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