search query: @supervisor Laasonen, Pentti / total: 20
references: 19-20 / 20
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| title | year | author | ||
| 19. | 1953 | Outinen, Hannu |
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| 20. | 1953 | Hellman, Olavi |
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INSSI
| title | year | author | ||
| 19. | 1953 | Outinen, Hannu |
||
| 20. | 1953 | Hellman, Olavi |