De 24-urige tijdsindeeling zal ingevoerd worden
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| Institution: | International Institute of Social History |
| Format: | IMAGE |
| Published: |
1926, 18 december
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| Online Access: | http://hdl.handle.net/10622/789E216C-1A44-4311-8AB2-5E7D62E26BF3 |
| Published: | 1926, 18 december |
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