search query: @instructor Keski-Rahkonen, Olavi / total: 15
references: 13-15 / 15
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title | year | author | ||
13. | 1996 | Paananen, Juhani |
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14. | 1996 | Hakokorpi, Timo |
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15. | 1991 | Lappi, Esa |
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