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4 St. 1 Min, 9 Jan 1954 Jahr - In 1954, he was elected the president of the International Union of Scientific Psychology and held this position till 1957.
Zugefügt zum Band der Zeit:
7 Feb 2018
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Jean Piaget
Datum:
4 St. 1 Min, 9 Jan 1954 Jahr
Jetzt
~ 70 years ago
