Guy, C. G. Data communications for engineers / [Book]. C.G. Guy. - Hampshire ; New York : Macmillan Education Ltd. ; McGraw-Hill., 1992. - x, 170 p. : ill. ; 24 cm. Includes bibliographical references (p. 162-163) and index. ISBN: 0070253544 0333555007 0333555015 LCCN: 92146890 Subjects--Topical Terms: Computer networks.Data transmission systems.