Top Secret: Data Encryption Techniques,Gilbert Held

Data & Image Compression Tools & Techniques, 1996 4th Edition by Gilbert Held HB

Data Communications: A - Hardcover, by Held Gilbert; Sarch - Very Good

Persuasion: Dark Psychology - Secret Techniques To ... by Anderson, R J Hardback

Data Communications: A Comprehensive Approach, By Gilbert Held and Ray Sarch

Data Over Wireless Networks: Bluetooth, WAP, and Wireless LANs by Gilbert Held

Understanding Data Communications, Held, Gilbert

Magi: The Quest for the Secret Tradition - Gilbert, Adrian Geoffrey