Roger B. (Roger Bradbury) Whitman
Tractor Principles The Action, Mechanism, Handling, Care, Maintenance and Repair of the Gas Engine Tractor
Roger B. (Roger Bradbury) Whitman · 2022
Public domain, Project Gutenberg. No sign-up.
Traction-engines
Roger B. (Roger Bradbury) Whitman · 2022
Public domain, Project Gutenberg. No sign-up.