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1
Design guides for biological wastewater treatment processes /
Washington, DC : U.S. Government Printing Office, 1972

Government Document Book
2
North Fork alluvial decontamination project : Hubbard Creek reservoir watershed /
by Jacob, Billy L.
Washington : For sale by the Supt. of Docs., U.S. Govt.Print.Off., 1974

Book
3
The removal of metals and viruses in advanced wastewater treatment sequences /
Cincinnati, Ohio : Springfield, Va. : Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ; available through the National Technical Information Service, 1980

Book
4
Enhancing trickling filter plant performance by chemical precipitation /
by Derrington, Robert E.
Washington : For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1973

Book
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