Electronic communications systems / 
William C. House, editor 
 - New York :  Petrocelli Books,  1980 
 - xv, 240 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0894330985 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication<br/>Data transmission systems<br/>Computer networks