search query: @instructor Hirvonen, Pekka / total: 6
references: 5-6 / 6
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| title | year | author | ||
| 5. | 1995 | Koskela, Niina |
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| 6. | 1986 | Viherto, Tero |
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INSSI
| title | year | author | ||
| 5. | 1995 | Koskela, Niina |
||
| 6. | 1986 | Viherto, Tero |