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history of technique (2) |
istoria tehnicii (2) |
Bădărău Eugen (1) |
history of pedagogy (1) |
history of physics (1) |
history of tehnical science (1) |
istoria fizicii (1) |
istoria pedagogiei (1) |
istoria ştiinţei (1) |
istoria ştiinţei tehnice (1) |
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