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Overhead Projectors (1 ene 1930 año – 24 dic 1939 año)
Descripción:
started out for military purposes, became widespread use to schools
Añadido al timeline:
17 ene 2018
0
0
407
Technology's timeline in education
fecha:
1 ene 1930 año
24 dic 1939 año
~ 9 years and 11 months
Fotos: