TY - BOOK AU - Shelly, Gary B. AU - Cashman, Thomas J. AU - Serwatka, Judy A. TI - Business data communications: introductory concepts and techniques / SN - 8131503321 AV - HD30.355 .S54 2004 PY - 2004/// CY - Australia PB - Cengage Learning KW - Business KW - Data Communications N1 - Includes index ER -