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Workbook Cabri Geometre. Using the computer for geometric constructions. Arbeitsbuch Cabri Geometre. Konstruieren mit dem Computer. (German)
Bonn: Duemmler. 1993. 167 p. With many figs., technical tips and didactical-methodical explanations. Ser. Title: Computer-Praxis Mathematik. [ISBN 3-427-45741-9]
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