Freeman, Roger L <br/><br/>
Practical data communications / 
Roger L. Freeman. 
 - Cainta, Rizal :  Jemma,  c1995. 
 - xxiv, 632 p. : ill. 
 - Wiley series in telecommunications and signal processing .
<br/><br/> Includes references, appendices and index. 
<br/><br/><label>ISBN: </label>97137010-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems