search query: @keyword electronic ballast / total: 4
references: 1-4 / 4
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title | year | author | ||
1. | 2006 | Kopola, Pälvi |
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2. | 2005 | Ahti, Antti |
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3. | 1997 | Sippola, Mika |
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4. | 1991 | Kuosmanen, Teijo |
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