A Simple Approach Without Equations
This book presents flight mechanics of aircraft, spacecraft, and rockets to technical and non-technical readers in...
U.F.O.
The Sightings, Information and Resources Guide.........
What Is A UFO?
Unidentified flying object (commonly abbreviated as UFO or U.F.O.) ......
The Simple Physics of Sophisticated Technology.
Focuses on the common recurring physical principles behind sophisticated modern devices
This book discu......