Beyda, William J. <br/><br/>
Basic data communications  comprehensive overview 
by William J. Beyda 
 - New Jersey  Prentice-Hall  1989 
 - xiv, 268p. 
<br/><br/><label>ISBN: </label>0130584215 
<br/><br/><label>Dewey Class. No.: </label>621.3819535  / N891