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  1. Geographic Patterns of At-Risk Species

    PublicationJournal ArticleUS Forest Service Report
  2. Standards for associations and alliances of the U.S. National Vegetation Classification

    PublicationJournal ArticleEcological Monographs
  3. How many endangered species are there in the United States?

    PublicationJournal ArticleFrontiers in Ecology & the Environment

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