Twenty years of world heritage Author Thorsell J. Journal/Series Parks | Vol. 3(3); 4 - 8; 5 p. Date 1992 Source IUCN (ID: ANA-048951) Publisher | Place of publication Science and Technology Letters Ltd. / IUCN - Commission on National Parks & Protected Areas | Gland, Switzerland Document type Article in periodical Language English Field of application International Subject Wild species & ecosystems Keyword Cultural heritage Protected area Other references Treaty Convention concerning the Protection of the World Cultural and Natural Heritage Treaty | Multilateral | Paris | Nov 23, 1972 Keyword: Inventory, Institution, Research, Cultural heritage, Financing, Education, Management/conservation, Data collection/reporting, Special fund, Protected area Source: IUCN (ID: TRE-155235)