Linear Algebra and Its Applications by Gilbert Strang 4ed INTERNATIONAL EDITION

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

Understanding Data Communications: From Fundamental... by Held, Gilbert Hardback

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

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Understanding Data Communications, Held, Gail,Held, Gilbert, Good Book