Text and pictures introduce the wedge, a simple machine placed between objects to split, tighten, or secure a hold.
- ISBN10 0756969131
- ISBN13 9780756969134
- Publish Date 1 August 2002 (first published 1 December 1997)
- Publish Status Out of Print
- Out of Print 4 June 2021
- Imprint Perfection Learning
- Format Hardcover (Library Binding)
- Language English