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- 73086786 abstract "Explains the principles and describes the uses of such simple machines as the pulley, wedge, lever and others.".
- 73086786 contributor B2257712.
- 73086786 created "c1974.".
- 73086786 date "1974".
- 73086786 date "c1974.".
- 73086786 dateCopyrighted "c1974.".
- 73086786 description "Explains the principles and describes the uses of such simple machines as the pulley, wedge, lever and others.".
- 73086786 extent "47 p. :".
- 73086786 identifier "081757431X :".
- 73086786 issued "1974".
- 73086786 issued "c1974.".
- 73086786 language "eng".
- 73086786 publisher "Westchester, Ill. : Benefic Press,".
- 73086786 subject "531/.8".
- 73086786 subject "Simple machines Juvenile literature.".
- 73086786 subject "Simple machines.".
- 73086786 subject "TJ147 .D37".
- 73086786 title "Finding out about simple machines / by Gene Darby.".
- 73086786 type "text".