search query: @keyword laatupiirit / total: 4
references: 2-4 / 4
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| title | year | author | ||
| 2. | 1997 | Hynninen, Jussi-Petteri |
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| 3. | 1997 | Savolainen, Mika Eljas |
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| 4. | 1994 | Ylinen, Jussi |
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