00321nam a2200109Ia 4500001000700000008004100007245008400048260001600132490003300148653001400181653001600195154661170722s9999    xx            000 0 und d  aHow much is an ecosystem worth?bAssessing the economic value of conservation /  bWB ,c2005.  aIUCN, The Nature Conservancy  aEcosystem  aEnvironment