Simmonds, Andrew Data communications and transmission principles : an introduction / Andrew Simmonds. - Hampshire ; London : MacMillan, 1997. - xi, 308 p. : ill. ; 24 cm. + pbk. Includes bibliographical references (p. 282-285) and index. ISBN: 0333646894 Subjects--Topical Terms: Digital communications.Telecommunication systems Dewey Class. No.: 005.71