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31 dic 1969 anni - THE HAND - HELD CALCULATOR

Descrizione:

Se utilizó par facilitar la enseñanza de las matematicas en las escuelas.

Aggiunto al nastro di tempo:

HISTORIA DE LA TECNOLOGIA EDUCATIVA JOHANA

Byjohana ruales tabla

30 ott 2018

Data:

31 dic 1969 anni

Adesso

~ 54 years ago

Immagini:

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