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dec 25, 1988 - Lerner (1989) añade un cuarto periodo al que podríamos denominar fase «contemporánea» o de «consolidación» (desde 1980 a la actualidad)
Added to timeline:
DIFICULTADES DE APRENDIZAJE
By
Paola Mys
20 Oct 2018
0
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833
Date:
dec 25, 1988
Now
~ 37 years ago
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