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- 69012623 abstract "Explains how man has achieved all the mechanical advances he knows through the use of five simple machines--lever, wheel and axle, pulley, screw, wedge, and plane.".
- 69012623 contributor B1929688.
- 69012623 created "[1969]".
- 69012623 date "1969".
- 69012623 date "[1969]".
- 69012623 dateCopyrighted "[1969]".
- 69012623 description "Bibliography: p. [143]-145.".
- 69012623 description "Explains how man has achieved all the mechanical advances he knows through the use of five simple machines--lever, wheel and axle, pulley, screw, wedge, and plane.".
- 69012623 extent "150 p.".
- 69012623 issued "1969".
- 69012623 issued "[1969]".
- 69012623 language "eng".
- 69012623 publisher "New York, Norton".
- 69012623 subject "621.9".
- 69012623 subject "T48 .P64 1969".
- 69012623 subject "Technology Juvenile literature.".
- 69012623 subject "Technology.".
- 69012623 subject "Tools Juvenile literature.".
- 69012623 subject "Tools.".
- 69012623 title "The story of tools; how they built our world and shaped man's life.".
- 69012623 type "text".