Shelly, Gary B;Cashman, Thomas J;Serwatka, Judy A. Business data communications: intriductory concepts and techniques. Intriductory concepts and techniques. - 1 - New Delhi Cengage Learning 2009 - xv,15.17,I20 ISBN: 9788131503324 Subjects--Topical Terms: None Dewey Class. No.: 004.65 SHEG