Telecommunication systems / 
Telecommunication Systems Course Team. 
 - Milton Keynes :  Open University Press,  1976. 
 - v. : ill. 
<br/><br/> Units 3 and 4 are in one volume. 
<br/><br/>Unit 2: Modulation. - - Unit 3: Channels and lines I. - - Unit 4: Channels and lines II. 
<br/><br/><label>ISBN: </label>033506101X (2) ; 0335061079 (3 & 4) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication systems.