Practical data communications/ 
Roger L. Freeman 
 - New York:  John Wiley,  1995. 
 - xxiv, 632 pages:  illustrations;  21 cm. 
<br/><br/> Includes index<br/> 
<br/><br/><label>ISBN: </label>971370310X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems
<br/><br/><label>LC Class. No.: </label>Circ TK 5105 .F74 1995