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A biography of the black engineer and inventor credited with many inventions, including refrigeration units for trucks and railroad cars, portable X-ray units, and the ticket dispenser.
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- ● biography & memoir, children's books
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A biography of the black engineer and inventor credited with many inventions, including refrigeration units for trucks and railroad cars, portable X-ray units, and the ticket dispenser.
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"A biography of the black engineer and inventor credited with many inventions, including refrigeration units for trucks and railroad cars, portable X-ray units, and the ticket dispenser."
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