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Oxlade, Chris.

Pulleys / Chris Oxlade. - 1st ed. - North Mankato, MN : Smart Apple Media, c2008. - 32 p. : ill. (some col.) ; 28 cm. - Simple machines. . - Oxlade, Chris. Simple machines. .

Paperback Includes index.

9781599200842 1599200848

1271222 QBI

2007012196


Pulleys.

621.8