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United States Environmental Protection Agency
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Items Found: 13
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An illustrated key to the planktonic rotifers of the Laurentian Great Lakes /
Biota of Freshwater Ecosystems. Identification Manual No. 2. The Genus 'Argulus' (Crustacea: Branchiura) of the United States.
Biota of Freshwater Ecosystems. Identification Manual No. 4. Freshwater Polychaetes (Annelida) of North America.
Biota of Freshwater Ecosystems. Identification Manual No. 5. The Freshwater Amphipod Crustaceans (Gammaridae) of North America.
Biota of Freshwater Ecosystems. Identification Manual No. 6. Aquatic Dryopoid Beetles (Coleoptera) of the United States.
Freshwater leeches (Annelida: Hirudinea) of North America,
Freshwater planarians (Turbellaria) of North America.
Freshwater unionacean clams (Mollusca: Pelecypoda) of North America,
Genera of freshwater nematodes (Nematoda) of eastern North America,
Guide to Aquatic Smartweeds (Polygonum) of the United States.
Guide to the Common Diatoms at Water Pollution Surveillance System Stations.
Introduction to Arthropods of Public Health Importance. Training Guide.
Picture-Key to the Genera of Aquatic Midges.
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