search query: @instructor Aaltonen, Pertti / total: 21
references: 18-21 / 21
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title | year | author | ||
18. | 1972 | Anjala, Matti |
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19. | 1970 | Vainio, Timo |
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20. | 1967 | Luhtala, Juhani |
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21. | 1964 | Arjas, Antti |
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