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  1. Philosophical Investigations.Ludwig Wittgenstein - 1953 - New York, NY, USA: Wiley-Blackwell. Edited by G. E. M. Anscombe.
    Editorial preface to the fourth edition and modified translation -- The text of the Philosophische Untersuchungen -- Philosophische untersuchungen = Philosophical investigations -- Philosophie der psychologie, ein fragment = Philosophy of psychology, a fragment.
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  • The Construction of Reality in the Child.Jean Piaget - 1954 - Routledge.
    First published in 1999. Routledge is an imprint of Taylor & Francis, an informa company.
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