TY - BOOK AU - Shelly, Gary B. AU - Cashman, Thomas J. AU - Serwatka, Judy A. TI - Business data communications: introductory concepts and techniques SN - 9788131503324 U1 - 004.6 PY - 2007/// CY - Australia PB - Thomson KW - Data transmission systems KW - Business enterprises - Communication systems KW - Business enterprises - Computer networks N1 - Includes index ER -