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allowing them to be grouped and searched accordingly.
Click on the blue triangle ᐅ to expand a category.
For another approach, please check the Dossiers. 

Drebbel
General Alkmaar‎ (23 P, 3 F) Biografie‎ (11 P, 2 F) Dossiers‎ (20 P) Geography‎ (5 P) Images‎ (1 C, 12 P) Innovations‎ (14 C, 15 P, 1 F) On paper‎ (3 C) Organisation‎ (4 C, 15 P) People‎ (4 C) Recent‎ (3 P) References‎ (10 P) Dossiers/sub	Innovator Optics‎ (2 C) Pyrotechnics‎ (1 C) Chemistry‎ (2 C) Control Technology‎ (4 C, 1 P, 1 F) Drebbologists Dr Arianna Borrelli Dr James Bradburne Hubert van Onna Naber Prof F Jaeger Prof Vera Keller Rich SantaColoma

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