Carlson, A. B., Au. <br/><br/>
Communication system 

 - 2nd,3rd 
 - New York  McGraw-Hill  1986 
<br/><br/><label>ISBN: </label>007009957X@A007009960X@A0071210288 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Communication system
<br/><br/><label>Dewey Class. No.: </label>621.38043  / C19C