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Last edited anonymously
April 29, 2008 | History

Harold Hellman

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7 works Add another?

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  • Cover of: Great feuds in medicine: ten of the liveliest disputes ever

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  • Cover of: The City in the World of the Future

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  • Cover of: Energy and Inertia
    First published in 1970 1 edition

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  • Cover of: Energy in the World of the Future

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  • Cover of: Feeding the World of the Future,

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  • Cover of: The Lever and the Pulley
    First published in 1971 1 edition

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  • Cover of: Technophobia: Getting Out of the Technology Trap

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April 29, 2008 Created by an anonymous user initial import