Duffy, Rosaleen. A trip too far : ecotourism, politics, and exploitation / Rosaleen Duffy. - London : Earthscan, 2002. - xiv, 210 p. ; 23 cm. Includes bibliographical references (p. [183]-204). ISBN: 1853837598 (pbk.) Subjects--Topical Terms: Ecotourism. Dewey Class. No.: 338.479104 / DUF