A comprehensive assessment of aquatic biodiversity across the entire Upper Mississippi, including a complete classification of aquatic systems and identification of 22 areas of freshwater biodiversity significance.
- Weitzell RE, Khoury ML, Gagnon P, Schreurs B, Grossman D, and Higgins J. Conservation Priorities for Freshwater Biodiversity in the Upper Mississippi River Basin. NatureServe and The Nature Conservancy. 2003.