Pulleys to the Rescue (Simple Machines to the Rescue) - Library Binding - GOOD

Wedges to the Rescue Reinforced Library Binding Sharon Thales

Wedges to the Rescue (Simple Machines to the Rescue) - ACCEPTABLE

Inclined Planes to the Rescue (Simple Machines to the Rescue) - GOOD

Wedges to the Rescue (First Facts: S..., Thales, Sharon

Screws to the Rescue (Simple Machines to the Rescue) - Library Binding - GOOD