De proefnemingen gaan door
| Institution: | International Institute of Social History |
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| Format: | IMAGE |
| Published: |
1955, 12 maart
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10622/C518A95B-08FF-40C1-A5F7-01F088D3D0CF |
| Published: | 1955, 12 maart |
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