Middleton, Robert G. <br/><br/>
Digital Communications 
Khanna, V.K. 
 - Indianapolis,;  T.Audel & Co.  1976 
 - 464 p.  ill  22 cm 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>0672232596 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio -  Amateurs' manuals