search query: @keyword § / total: 5
references: 1-5 / 5
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title | year | author | ||
1. | 1976 | Penttinen, Heikki Juhani |
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2. | 1975 | Välinoro, Tapio |
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3. | 1975 | Virtasalo, Hannu |
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4. | 1971 | Virtanen, Risto |
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5. | 1948 | Sulonen, Martti Seppo |
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