Walker, John R., 1944- Tourism : concepts and practices / John R. Walker, Josielyn T. Walker. - Boston : Prentice Hall, c2011. - xxxviii, 537 p. : col. ill., col. maps ; 27 cm. Includes bibliographical references and index. ISBN: 9780138142452 0138142459 LCCN: 2009047970 Subjects--Topical Terms: Tourism. LC Class. No.: G155.A1 / W15 2011 Dewey Class. No.: 910.68