search query: @instructor Erkkilä, Ilkka / total: 4
references: 1-4 / 4
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title | year | author | ||
1. | 1997 | Kontio, Harri |
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2. | 1993 | Veijalainen, Vesa |
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3. | 1992 | Leinonen, Reijo |
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4. | 1981 | Tukia, Pertti |
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