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- 15:04, 25 July 2019 Sarah Oberbichler (talk | contribs) deleted page Abstraction, Re-Presentation, and Reflection: An Interpretation of Experience and of Piaget’s Approach (content was: "In: L. P. Steffe (Ed.), Epistemological foundations of mathematical 130 experience. New York: Springer, 45–67, 1991.<br>...", and the only contributor was "Stefanhechl" (talk))