Dungan, Frank R. <br/><br/>
Electronic communications systems 

 - 3rd ed.  
 -  ITP  1998 
 - xi+819 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic communications
<br/><br/><label>Dewey Class. No.: </label>621.380413  DUN `R'