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The activated sludge process at Worcester
Details of works and results. (5000 w.) (79937 A)
The activated sludge process at Worcester
Details of works and results. (5000 w.) (79937 A)
Activated sludge process at Withington, Manchester
Engineering Index Backfile | 1923
Guiding principles of activated sludge process
Engineering Index Backfile | 1931
|Some developments in activated-sludge process
Engineering Index Backfile | 1961
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