TY - BOOK AU - United Nations Department of Public Information ED - Earth Summit plus 5 Special Session of the General Assembly to Revie w and Appraise the Implementations of Agenda 21 TI - The United Nations convention to combat desertification : : a new r esponse to an age-old problem PY - 1997/// CY - New York : PB - United Natiions, KW - Desertification KW - Control ER -