De 8-uren-dag
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| Institution: | International Institute of Social History |
| Format: | IMAGE |
| Published: |
1919, 11 januari
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| Online Access: | http://hdl.handle.net/10622/4D390F06-A0B3-4C7F-A7B4-495762ADE0FC |
| Published: | 1919, 11 januari |
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