Clark, A. P. <br/><br/>
Principles of digital data transmission /  [Book]. 
A.P. Clark.  
 - 2nd ed. 
 - London :   Pentech,   1983. 
 - 300p. :   ill. ;   23cm. 
<br/><br/> Originally published: 1976.  Includes index. 
<br/><br/><label>ISBN: </label>0727316133 (cased) 0727316141 (pbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Digital electronics.<br/>Telecommunication--Equipment and supplies.