search query: @keyword estimation / total: 24
references: 21-24 / 24
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| title | year | author | ||
| 21. | 1988 | Kallela, Jari |
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| 22. | 1985 | Ruokonen, Tuula |
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| 23. | 1984 | Harmo, Panu |
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| 24. | 1981 | Ranta, Marja-Liisa |
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