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- 72602439 contributor B2196508.
- 72602439 contributor B2196509.
- 72602439 contributor B2196510.
- 72602439 created "1971 [i.e.1972]".
- 72602439 date "1971 [i.e.1972]".
- 72602439 date "1972".
- 72602439 dateCopyrighted "1971 [i.e.1972]".
- 72602439 description "Includes bibliographical references.".
- 72602439 extent "xii, 154 p.".
- 72602439 isPartOf "Water pollution control research series".
- 72602439 issued "1971 [i.e.1972]".
- 72602439 issued "1972".
- 72602439 language "eng".
- 72602439 publisher "Washington [U.S. Environmental Protection Agency]; for sale by the Supt. of Docs., U.S. Govt. Print. Off.,".
- 72602439 subject "628/.354".
- 72602439 subject "Sewage Purification Activated sludge process.".
- 72602439 subject "TD756 .G38".
- 72602439 title "Biological concepts for design and operation of the activated sludge process, by Anthony F. Gaudy, Jr., and Elizabeth T. Gaudy. [Prepared] for the Office of Research and Monitoring, Environmental Protection Agency.".
- 72602439 type "text".