Fennell, David A., 1963- Ecotourism / David Fennell - 3rd ed. - London : Routledge, 2008 - xviii, 282 p. : ill. ; 25 cm. Bibliography : p. [238]-272 ISBN: 9780415429313 (hardcover) RM163.22 9780415429306 (softcover) 0415429315 Subjects--Topical Terms: Ecotourism