Roddy, Dennis & Coolen, John <br/><br/>
Electronic Communications 
By Dennis Roddy & John Coolen 
 - Third Edition 
 -  Reston Publishing Company Inc.  1984 
 - xii, 788 pages, 20 cm. 
<br/><br/> includes appendix & index 
<br/><br/><label>ISBN: </label>971-8636-32-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunications.
<br/><br/><label>Dewey Class. No.: </label>621.38 R61 C3