Housley, Trevor. <br/><br/>
Data communications & teleprocessing systems / 
Trevor Housley. 
 - 2nd ed. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  c1987. 
 - xvii, 474 p. :  ill. 
<br/><br/>
<br/><br/><label>ISBN: </label>0131973932 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks.<br/>Data transmission systems.
<br/><br/><label>LC Class. No.: </label>TK51055  / .H68 1987 
<br/><br/><label>Dewey Class. No.: </label> / H842