Making Machines with Springs (Simple Machine Projects) by Chris Oxlade Hardback

Making Machines with Wheels and Axles (Simple Machin... by Chris Oxlade Hardback

Making Machines with Ramps and Wedges... By Oxlade, Chris, Hardcover,Excellent

Making Machines with Screws Hardcover Chris Oxlade

Making Machines with Levers (Simple Mach... by Chris Oxlade Paperback / softback

Simple Experiments with Wedges Paperback Chris Oxlade

Very Useful Machines: Ramps And Wedges P... by Chris Oxlade Paperback / softback

Simple Experiments with Wedges Paperback Chris Oxlade