search query: @instructor Oraskari, Risto / total: 4
references: 1-4 / 4
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| title | year | author | ||
| 1. | 1991 | Ehrnrooth, Magnus Johan |
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| 2. | 1989 | Dahlström, Tapani |
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| 3. | 1987 | Kajaste, Terhi |
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| 4. | 1982 | Ruohola, Ilkka |
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