search query: @author Koskinen, Heikki / total: 4
references: 1-4 / 4
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| title | year | author | ||
| 1. | 1971 | Koskinen, Heikki |
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| 2. | 1964 | Koskinen, Heikki |
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| 3. | 1964 | Koskinen, Heikki |
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| 4. | 1960 | Koskinen, Heikki |
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