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Books from the extended shelves:
DeMers, Larry D.: Evaluation of operation and maintenance factors limiting municipal wastewater treatment plant performance : phase II (Cincinnati, Ohio : Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1980., 1980), also by Bob A. Hegg, James R. Schultz, Kerwin L. Rakness, Municipal Environmental Research Laboratory, and inc M & I (page images at HathiTrust)
DeMers, Larry D: Evaluation of pollution control processes : Upper Thompson Sanitation District (Cincinnati, Ohio : Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1980., 1980), also by Bob A. Hegg, Robert H. Cheney, Kerwin L. Rakness, Municipal Environmental Research Laboratory, and inc M & I (page images at HathiTrust)See also what's at your library, or elsewhere.
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