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jan 9, 1951 - Joaquin Lima de Moraes y José Valesin publicaron la primera edición de las explicaciones del uso de sorobá o ábaco japonés para ciegos de manera que resultaba mucho más práctico el uso de esta herramienta, adaptada para ciegos.
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Linea del Tiempo - Personas Invidentes.
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Juan Diaz
10 Oct 2018
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Date:
jan 9, 1951
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~ 75 years ago
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