Leonard S. Hobbs
The Wright Brothers' Engines and Their Design
Leonard S. Hobbs · 2012
Public domain, Project Gutenberg. No sign-up.
Wright, Orville, 1871-1948Wright, Wilbur, 1867-1912Airplanes -- Motors -- History
Leonard S. Hobbs · 2012
Public domain, Project Gutenberg. No sign-up.