Murphy, R. J. <br/><br/>
Telecommunications networks :  a technical introduction /  [Book]. 
R.J. "Bert" Murphy. 
 - Indianapolis, Indiana :   Howard W. Sams & Company,   1987. 
 - xxiii, 304 p. :   ill. ;   26 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0672225883 081262225882 
<br/><br/><label>LCCN: </label>87061013 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.<br/>Integrated services digital networks.<br/>Telecommunication systems.