Hours of work of principal categories of PTT employees. Postal, Telegraph and Telephone International, 21st world congress, Paris (France), 3-7 July, 1972
| Institution: | International Institute of Social History |
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| Format: | TEXT |
| Published: |
Geneva,
[1972]
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10622/C74DB1C7-9A1F-483A-A088-14646B5DF66F |
| Published: | [1972] |
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