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| Issue Date | Title | Author(s) |
|---|---|---|
| 2017 | The biological activities of β-glucosidase, phosphatase and urease as soil quality indicators: a review | Adetunji, Adewole Tomiwa ; Lewu, Francis B ; Mulidzi, R ; Ncube, Bongani |
| 2007 | Method for real time optimal control of the activated sludge process | Tzoneva, Raynitchka |