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21 Dez 1957 Jahr - 1957- León Festinger publicó el libro que influyó en la generación de psicologías sociales: La teoría de la disonancia cognoscitiva
Zugefügt zum Band der Zeit:
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Stephanie Garcia
7 Dez 2017
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21 Dez 1957 Jahr
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~ 67 years ago
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