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History
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Physics
Histoire
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SCIENCE
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General
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Physique
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Energy
5
Mechanics
5
Aspect social
2
BIOGRAPHY & AUTOBIOGRAPHY
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Electricity
2
Electricity & Magnetism
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Electrification
2
Elektriciteit
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Elektrificatie
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Elektrizität
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Étude et enseignement (Secondaire)
2
Physical Sciences & Mathematics
2
Physicists
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SOCIAL SCIENCE
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Science & Technology
2
Scientists
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Social aspects
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Sozialer Wandel
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Study and teaching (Secondary)
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history
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19th century
1
Astronomie
1
Astronomy
1
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