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1.
Get to know screws / by Paul Challen. by
  • Challen, Paul C. (Paul Clarence), 1967-
Series: Get to know simple machines
Material type: Text Text; Format: print ; Literary form: Not fiction ; Audience: Primary;
Publication details: New York : Crabtree Pub., c2009
Other title:
  • Screws
Availability: Items available for loan: Ayers (1)Call number: 621.8 CHA.

2.
Get to know wheels and axles / by Paul Challen. by
  • Challen, Paul C. (Paul Clarence), 1967-
Series: Get to know simple machines
Material type: Text Text; Format: print ; Literary form: Not fiction ; Audience: Primary;
Publication details: New York : Crabtree Pub., c2009
Other title:
  • Wheels and axles
Availability: Items available for loan: Ayers (1)Call number: 621.8 CHA.

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