کتاب های Roger Timings
Newnes workshop engineer's pocket book
Roger Timings, 2000
Fabrication and Welding Engineering
Roger Timings, 2008
Fabrication and Welding Engineering
Roger Timings, 2008
Basic Engineering Technology
Roger L. Timings, 1988
Engineering Fundamentals
Roger Timings, 2002
Basic Manufacturing,
Roger Timings, 2004
Engineering Fundamentals
Roger Timings, 2002
