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2. Intangle
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4. Harold G. Nelson and Erik Stolterman. 2003. The Design Way: Intentional Change in an Unpredictable World?: Foundations and Fundamentals of Design Competence. Educational Technology. Harold G. Nelson and Erik Stolterman. 2003. The Design Way: Intentional Change in an Unpredictable World?: Foundations and Fundamentals of Design Competence. Educational Technology.