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Aquatic dryopoid beetles (Coleoptera) of the United States, by Harley P. Brown.
Publication info:
[Washington,U.S. Environmental Protection Agency]; for sale by the Supt. of Docs., U.S. Govt. Print. Off.,1972.
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Freshwater isopods (Asellidae) of North America, by W. D. Williams.
Publication info:
[Washington,U.S. Environmental Protection Agency]; for sale by the Supt. of Docs., U.S. Govt. Print. Off.,1972.
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Freshwater planarians (Turbellaria) of North America.
Publication info:
[Washington,U.S. Environmental Protection Agency]; for sale by the Supt. of Docs., U.S. Govt. Print. Off.,1972.
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Freshwater polychaetes (Annelida) of North America, by Nancy Foster.
Publication info:
[Washington,U.S. Environmental Protection Agency]; for sale by the Supt. of Docs., U.S. Govt. Print. Off.,1972.
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