Dahnsen, Alan

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Bicycles

  • Dahnsen, Alan
1978
Describes a variety of bicycles from the first one made in 1790 to the high-speed, multi-geared cycles of today and includes information on the basic parts of bicycles and how they work.

Aircraft

  • Dahnsen, Alan
1978
Describes the characteristics and different uses of a variety of aircraft including balloons, dirigibles, gliders, and airplanes.
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