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| MLA: | Biodiversity. Ed. s1m. Washington: National Academy Press, 1988. |
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| APA: | (APA style citations are not yet implemented.) |
| Chapter | Page(s) | Quote | Keywords |
|---|---|---|---|
| Current State of Biological Diversity, The | 13 | Conservative estimate of extinction rate: 17,500 species per year, or one out of every thousand species per year. This figure is 1,000 to 10,000 times that before human intervention. |