The Heinz Center: The State of The Nation´s Ecosystems: Measuring the Lands, Waters, and Living Resources of the United States. Summary and Highlights. Cambridge, University Press, New York, 2002.
| PDF: | State_of_env_US_Summary.pdf (2.332.220 Bytes) |
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| Coastal databases provided and maintained by EUCC - The Coastal Union Germany |  |