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Roger Francis Bridgman

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1) 1000 inventions and discoveries

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Summarizes one thousand notable inventions and discoveries of ancient and modern times, from 3,000,000 B.C. to the beginning of the twenty-first century A.D.

2) 1,000 inventions & discoveries

Author

Bridgman, Roger Francis

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Summarizes 100 notable inventions and discoveries of ancient and modern times, from 3,000,000 B.C. to the beginning of the twenty-first century A.D.

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Roger Francis Bridgman

1) 1000 inventions and discoveries

2) 1,000 inventions & discoveries