Marshall, G. J. <br/><br/>
Principles of digital communications / 
G. J. Marshall. 
 - London :  McGraw-Hill,  c1980. 
 - ix, 170 p.  ill  23 cm. 
 - McGraw-Hill electrical engineering series .
<br/><br/><label>ISBN: </label>0070840962 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Digital communications.