Books by Ted Rygas
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-20%
Invention Algorithm (Triz) - Workbook Creativity Method for Generating Breakthrough Inventions
€16.74
€20.93
-20% with code BOOKS
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-20%
Practical Formulas for Calculus, Algebra and Trigonometry For Students, and Engineers and Scientists, - University and Upper High School Level
€7.62
€9.53
-20% with code BOOKS
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