Freeman, Roger L. <br/><br/>
Practical data communications / 
Roger L. Freeman. 
 - 2nd ed. 
 - New York :  John Wiley,  2001. 
 - xxxi, 825 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0471393029 (cloth : alk. paper) 
<br/><br/><label>LCCN: </label>00043692  
<br/><br/><label>LC Class. No.: </label>TK5105 .F72 2001  / .F72 2001 
<br/><br/><label>Dewey Class. No.: </label>004.6