search query: @supervisor Hjelt, Sven-Erik / total: 4
references: 2-4 / 4
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title | year | author | ||
2. | 1976 | Vironmäki, Jouko Juhani |
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3. | 1974 | Oksama, Matti Kalervo |
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4. | 1973 | Paatsola, Olavi |
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