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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
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the first commercial AM radio broadcast is made by KDKA (15 janv. 1921 – 19 sept. 1928)
Ajouté au bande de temps:
27 sept. 2017
0
0
531
tv production
Date:
15 janv. 1921
19 sept. 1928
~ 7 years and 8 months
