search query: @keyword nitrification / total: 9
references: 6-9 / 9
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title | year | author | ||
6. | 2003 | Hostikka, Salla |
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7. | 1999 | Hakkila, Kirsi |
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8. | 1998 | Kotro, Mikko |
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9. | 1997 | Meriluoto, Jukka |
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