00455nam a2200145   450000500170000000700040001700800050002105000230002610000190004924501070006826000400017530000290021550000340024465000310027820150514090042.0000000s  aSB 481.A4bD4 1990  aDixon, John B.  aEconomics of Protected Areas:bA New Look at Benefits and Costs /cby John A.Dixon and Paul B. Sherman  aLondon.:bEast West Centre,cc1990.  axvii,234p.:bIll. maps.;  aincludes references and index  aEconomicsxProtected Areas