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15 mai 1922 - Радио в обучении

Description:

Одним из первых университетов, внедривших радио в обучении, был Государственный Университет Пенсильвании, который начал свое вещание в 1922 году

Ajouté au bande de temps:

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ByЕвгения
17 sept. 2018

Date:

15 mai 1922
Maintenaint
~ Il y a 102 ans
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