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4 jan 1840 ano - se acepta oficialmente

Descrição:

El sistema braille no fue aceptado ni difundido fácilmente ya que suponía un cambio drástico con respecto a la tendencia anterior. Es en el año 1840 cuando se acepta oficialmente

Adicionado na linha do tempo:

New timeline

ByKatia Raitarski Lozano
3 set 2018

Data:

4 jan 1840 ano
Agora
~ 184 years ago
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