Ruth Kassinger

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Build a Better Mousetrap. Make Classic Inventions, Discover Your Problem-Solving Genius, and Take the Inventor's Challenge

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Год написания книги 2018

Discover the secrets behind some amazing inventions! Through observation, experimentation, and perseverance, humans through the ages have managed to solve a whole array of perplexing problems. These...

Ruth Kassinger

Произведения автора 1

РОМАНЫ и ПОВЕСТИ

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