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15 dic 1957 anni - El IPN inició sus transmisiones en circuito cerrado con clases de matemáticas impartidas por el profesor Vianney Vergara.

Aggiunto al nastro di tempo:

Televisión en México

ByFlor RG
21 nov 2017

Data:

15 dic 1957 anni
Adesso
~ 66 years ago
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