TY - BOOK AU - Gary B. Shelly, Thomas J. Cashman, Judy A. Hill. TI - Business data communications: introductory concepts and techniques SN - 789559587 U1 - 004.22 S545 PY - 2001/// CY - Boston PB - Course technology KW - Business enterprises KW - Communication systems. Data transmission systems. Business enterprises KW - Computer networks N1 - Includes index ER -