search query: @instructor Pulkkinen, Juhani / total: 4
references: 2-4 / 4
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| title | year | author | ||
| 2. | 1979 | Kilpinen, Erja |
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| 3. | 1979 | Kokkonen, Kari Veikko |
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| 4. | 1978 | Pieviläinen, Timo Antero |
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