Simple machines / by Allan Fowler ; consultant, Janann V. Jenner.
Describes and compares the four kinds of simple machines, levers, pulleys, wheels, and ramps.
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| Format: | Book |
| Language: | English |
| Published: |
New York :
Children's Press,
c2001.
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| Series: | Rookie read-about science.
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| Subjects: |
