Watersheds of the World- Aridity 验》乙 p Projection: Robinson Citation: Revenga, C.S. Murray, I Abramovitz, and A Hammond, 1996. Watersheds of the World: Ecological value and vulnerabilty. Washington, DC: World Resources Institute. eEarthTrends 2002 WorkWatersheds of the World - Aridity Map Projection: Robinson Citation: Revenga, C., S. Murray, J. Abramovitz, and A. Hammond, 1998. Watersheds of the World: Ecological Value and Vulnerability. Washington, DC: World Resources Institute. © EarthTrends 2002 World Resources Institute. All rights reserved. Fair use is permitted on a limited scale and for educational purposes