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Biology of wastewater treatment

by Gray, N.F | .

Series: Edition: Language: English Publication details: Oxford ; Oxford University Press ; 1989Availability: Items available for loan: 1 Call number: 628.35Gra.

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Activated sludge : theory and practice

by Gray, N.F | .

Series: Edition: Language: English Publication details: Oxford ; Oxford University Press, ; 1990Availability: Items available for loan: 1 Call number: 628.356 Gra.

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Water technology : an introduction for scientists and engineers

by Gray, N.F | .

Series: Edition: Language: English Publication details: ; London : Arnold, 1999 ; 1999Availability: Items available for loan: 1 Call number: 628.54 Gra.

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