Sustaining America's Aquatic Biodiversity. Crayfish Biodiversity and Conservation
Helfrich, Louis A. (Louis Anthony), 1942-
DiStefano, Robert J., 1959-
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Provides a description of the structure and appearance of crayfish, the habitats they live in, how they live and reproduce, how to collect them, why they are of importance, and threats to their survival; document also includes web links to more information.