Status of desertification and implementation of the United Nations plan of action of combat desertification : report of the excutive director / - xv,88p. ; 24 cm. - United Nations , Environment Programme; . Includes annex. Subjects--Topical Terms: Economics Index Terms--Genre/Form: Desertification.Environmental effects.Environmental assessment.Environmental protection.Environmental monitoring.Project evaluation.Arid zones.UN. Dewey Class. No.: 333.73616 / U58