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1
Applied data communications : a business-oriented approach / James E. Goldman.
New York : J. Wiley, c1998.
xiv, 663 p. : ill. ; 27 cm.
2
Business data communications : introductory concepts and techniques / Gary B. Shelly, Thomas J. Cashman, Judy A. Serwatka.
Cambridge, Mass. : Course Technology, 1998.
1v. : ill. (some col.) ; 28 cm.