Cleverdon, Robert. International tourism to 1990 / by Robert Cleverdon, Anthony Edwards. - Cambridge, Mass. : Abt Books, c1982. - xv, 274 p. : ill. ; 26 cm. - EIU special series ; 4 . "Economist Intelligence Unit Ltd." Bibliography: p. 269-274. ISBN: 0890115826 : LCCN: 82013847 Subjects--Topical Terms: Tourism. LC Class. No.: G155.A1 / C493 1982 Dewey Class. No.: 382.45 / CLI 1982