Big science - Simple machines Here are seven simple machines. How do you think they help us do work?

Name: Big science - Simple machines Here are seven simple machines. How do you think they help us do work?
Author: Scholastic
ISBN: 0590728628

Author: Scholastic

Publisher: SCHOLASTIC

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Category: Big Book

ISBN: 0590728628

Barcode: 110076

Shelf mark: TR 500 B