Handbook of data communications 

 - Manchester :  NCC Publications,  1975 
 - 396 p. :  ill. ;  24 cm. 
<br/><br/>Bibliography: p.373-374 
<br/><br/><label>ISBN: </label>0850121213 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems