La apertura comercial en Mexico del servicio telefonico de larga distancia a partir de 1997 : radioreportaje
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| Format: | Tesis de licenciatura |
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MX
1997
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| Online Access: | https://hdl.handle.net/20.500.14330/TES01000247670 http://132.248.9.195/ppt2002/0247670/Index.html |