Ward, Frank A. Valuing nature with travel cost models : a manual / Frank A. Ward and Diana Beal - Cheltenham : Edward Elgar, c2000. - vii, 255 p. ; 22 cm. - New horizons in environmental economics . ISBN: 1840640782 LCCN: Subjects--Topical Terms: Natural resourcesManagementEconomic policy LC Class. No.: HC21 / .W37 2000 Dewey Class. No.: 333.70723 / W258v