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Book, 2005
Current format, Book, 2005, 1st American ed, All copies in use.
Book, 2005
Current format, Book, 2005, 1st American ed, All copies in use. Offered in 0 more formats
Describes the basic science principles and the history behind many inventions including the spearhead, the wheel, the earth ramp, the plow, a shadoof, the raft, a bridge, and paint. Includes hands-on problem solving and make-and-do projects.
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