search query: @instructor Virtanen, Pekka V. / total: 5
references: 1-5 / 5
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| title | year | author | ||
| 1. | 1992 | Vesala, Riitta |
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| 2. | 1990 | Torkkeli, Outi |
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| 3. | 1989 | Pihala, Anita |
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| 4. | 1988 | Kotiranta, Eija |
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| 5. | 1988 | Paunula, Ilkka |
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