Bigelow, Stephen J. <br/><br/>
Understanding Telephone 
By Stephen J. Bigelow 
 - Third Edition 
 -  Texas Instruments, Inc.  1984 
 - v, 367 pages, 22 cm.  
<br/><br/> includes index & glossary 
<br/><br/><label>ISBN: </label>971-8613-53-6 
<br/><br/><label>Dewey Class. No.: </label>621.3856 D48t C3