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Histoire
13
History
13
Congr�es
10
Congresses
8
Aspect social
2
Math�ematiques
2
Mathematics
2
Science
2
Sciences
2
Social aspects
2
Technologie
2
Technology
2
�Eclairage �electrique
1
Agriculture
1
Amerikaanse Vrijheidsoorlog
1
Anthropology
1
Bev�olkerung
1
CONFERENCES
1
Ciencia Da Computacao Ou Informatica
1
Computacao (Metodologia E Tecnicas)
1
Computers
1
Conditions �economiques
1
Cultural
1
Cultural Policy
1
D�ecouvertes scientifiques
1
D�emographie
1
Datenverarbeitung
1
Demographie
1
Demography
1
Discoveries in science
1
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