search query: @keyword vapaa energia / total: 2
references: 1-2 / 2
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| title | year | author | ||
| 1. | 2012 | Vuorikoski, Sirius |
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| 2. | 2011 | Karlson, Emil |
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INSSI
| title | year | author | ||
| 1. | 2012 | Vuorikoski, Sirius |
||
| 2. | 2011 | Karlson, Emil |