Goldstein, Fred R. <br/><br/>
ISDN in perspective / 
Fred R. Goldstein. 
 - Reading, Mass. :  Addison-Wesley,  1992. 
 - 246 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0201500167  RM124.41 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Integrated services digital networks.