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- catalog contributor b7133928.
- catalog contributor b7133929.
- catalog created "1971.".
- catalog date "1971".
- catalog date "1971.".
- catalog dateCopyrighted "1971.".
- catalog description "Includes bibliographical references.".
- catalog extent "ix, 125 p.".
- catalog isPartOf "Water pollution control research series".
- catalog issued "1971".
- catalog issued "1971.".
- catalog language "eng".
- catalog publisher "Washington [Environmental Protection Agency, Water Quality Office]; for sale by the Supt. of Docs., U. S. Govt. Print. Off.,".
- catalog subject "628/.354".
- catalog subject "Sewage Purification Activated sludge process.".
- catalog subject "TD756 .D35".
- catalog title "Combined treatment of domestic and industrial wastes by activated sludge. [Prepared] for the Water Quality Office, Environmental Protection Agency.".
- catalog type "text".