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Small Inventions That Make a Big Difference (Books for World Explorers Series 5, No 2)
Small Inventions That Make a Big Difference - Books for World Explorers Series 5, No 2 Author:National Geographic Society (U. S.) Describes how inventors think and work, explains how one invention--plastic--has changed the world, and briefly discusses seventy-five other important inventions, from the jet engine to the potato chip.