Green, D. C. Data communication [Book] / D. C. Green. - 2nd ed. - Harlow, Essex, England : Longman Scientific & Technical, 1995. - [vii], 216 p. : ill. ; 25 cm. Includes index. All. ISBN: 0582245206 Subjects--Topical Terms: Data transmission systems. Dewey Class. No.: 004.6