Productief werken :
| Institution: | International Institute of Social History |
|---|---|
| Format: | TEXT |
| Published: |
's-Gravenhage,
1948.
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10622/5CDF1084-7618-41CF-80E3-C6E5F2C11368 |
| Published: | 1948. |
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