La semana de cuarenta horas (descartada de la Ley federal del trabajo)
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| Format: | Tesis de licenciatura |
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MX
1971
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| Online Access: | https://hdl.handle.net/20.500.14330/TES01000194165 http://132.248.9.195/pmig2019/0194165/Index.html |
| Description not available. |