Lenk, John D. <br/><br/>
Handbook of data communications /  [Book]. 
John D. Lenk.  
 - Englewood Cliffs, N.J. :   Prentice-Hall,   1984. 
 - xi, 308 p. :   ill. ;   24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0133773175 
<br/><br/><label>LCCN: </label>83016031 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.<br/>Digital communications.