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2
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3
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4
"Language" and intelligence in monkeys and apes comparative developmental perspectives
Argitaratua 1990Liburua -
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The evolution of intelligence a general theory and some of its implications
Argitaratua 1974Liburua -
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7
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The evolution and growth of human behavior a revision of Psychological Development
Argitaratua 1955Liburua