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  • Work & Simple Machines

    Jon Richards

    Library Binding (Copper Beech, March 1, 2000)
    An examination of wheels, pulleys, levers, and other simple machines looks at the physics behind them and the inventions and discoveries throughout history that have made our modern, mechanical world the place it is.
    O

  • Work & Simple Machines

    Jon Richards

    Paperback (Stargazer Books, Aug. 16, 2004)
    None
    F

  • Work & Simple Machines

    Jon Richards

    Paperback (Stargazer Books, Aug. 16, 1696)
    Excellent Book