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  "title": "Six Psychological Studies",
  "subtitle": null,
  "url": "https://www.archivodelibros.es/jean-piaget/en/six-psychological-studies/9780394704623",
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  "isbn": "978-03-9470-462-3",
  "pages": 192,
  "published": "1968-09-12",
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  "description": "This volume presents six essays—collected in English for the first time—that are an incisive summary and a useful introduction to the work of the eminent psychologist. The development of behavior...",
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    "url": "https://www.archivodelibros.es/jean-piaget/en/six-psychological-studies"
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  "authors": [
    {
      "name": "Jean Piaget",
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