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15 dic 1957 año - El IPN inició sus transmisiones en circuito cerrado con clases de matemáticas impartidas por el profesor Vianney Vergara.
Añadido al timeline:
Televisión en México
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Flor RG
21 nov 2017
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fecha:
15 dic 1957 año
Ahora mismo
~ 66 years ago
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