search query: @author Virtamo, Jorma / total: 2
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| title | year | author | ||
| 1. | 1972 | Virtamo, Jorma |
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| 2. | 1969 | Virtamo, Jorma |
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| title | year | author | ||
| 1. | 1972 | Virtamo, Jorma |
||
| 2. | 1969 | Virtamo, Jorma |