How pulleys work
| Main Author: | |
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| Format: | Book |
| Published: |
USA :
Weekly Reader Early Learning Library ,
2007
|
| Series: | How simple machines work
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| Subjects: |
| Item Description: | Children ages 7-9 years old (orange) |
|---|---|
| Physical Description: | 24pg. : col. ill. |
| ISBN: | 0836873483 9780836873481 |