Electronic communication 
Shrader, Robert L. 
 -  McGraw-Hill Book Company.  1985 
 - 754 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71301170-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronics.
<br/><br/><label>Dewey Class. No.: </label>621.38 Sh8e 1985