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history of tehnical science (4) |
istoria ştiinţei (4) |
istoria ştiinţei tehnice (4) |
history of science (3) |
history of pedagogy (2) |
history of technique (2) |
istoria pedagogiei (2) |
Beleş Aurel (1) |
Buia Alexandru (1) |
Duca Gheorghe (1) |
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