search query: @supervisor Kivisalo, B. / total: 20
references: 18-20 / 20
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title | year | author | ||
18. | 1957 | Ahtiainen, Juhani |
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19. | 1957 | Koskinen, Erkki Viljami |
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20. | 1957 | Myllymäki, Hannu |
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