Radar Technology Encyclopedia (Electronic Edition)
David K. Barton & Sergey A. Leonov
Understanding Telephone Electronics, Fourth Edition
Steve Winder & Joseph Carr & Stephen Bigelow
Electronic Circuits: Fundamentals and Applications
Mike Tooley
The Telephony Book, Understanding Telephone Systems and Services
Jane Laino
The Art of Paragliding
Dennis Pagen
Understanding the Sky - A Sport Pilot's Guide to Flying Conditions
Paragliding Pilots Handbook
Papillon Paragliding
Elementary Pilot Training Guide
BHPA